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From: Mohit Sethi M <mohit.m.sethi@ericsson.com>
To: Steve Hanna <steve@hannas.com>, "secdir@ietf.org" <secdir@ietf.org>
CC: "draft-ietf-emu-eap-noob.all@ietf.org" <draft-ietf-emu-eap-noob.all@ietf.org>, "emu@ietf.org" <emu@ietf.org>
Thread-Topic: Secdir early review of draft-ietf-emu-eap-noob-01
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Date: Thu, 2 Jul 2020 07:10:01 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/secdir/QWbQ6H2Iz_UvQvsMxXQ7n1fsJOY>
Subject: Re: [secdir] Secdir early review of draft-ietf-emu-eap-noob-01
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Thu, 2 Jul 2020 12:30:19 -0700
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To: Charlie Kaufman <charliekaufman@outlook.com>
Cc: "secdir@ietf.org" <secdir@ietf.org>, "iesg@ietf.org" <iesg@ietf.org>,  "draft-ietf-ippm-stamp-option-tlv.all@ietf.org" <draft-ietf-ippm-stamp-option-tlv.all@ietf.org>
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Subject: Re: [secdir] Secdir review of draft-ietf-ippm-stamp-option-tlv-06
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Hi Charlie,
you might be interested to know that another case of using ICMP in our
document was pointed out in LC comments. That was used to report a failure
of HMAC authentication verification. The authors discussed it and have
agreed to use a new STAMP TLV Flag. You can find updates (also addressing
GenART IETF LC comments by Dan Romascanu) in the attached copies of the
working version of the draft and the diff to -06.
I greatly appreciate your consideration and feedback.

Regards,
Greg

On Mon, Jun 29, 2020 at 1:19 PM Greg Mirsky <gregimirsky@gmail.com> wrote:

> Hi Charlie,
> thank you for your thorough review, detailed questions, and
> thoughtful suggestions. We've discussed your comments and propose changes
> that are described below. Also, you can find the changes highlighted in the
> attached diff between the -06 and the new working version of the document.
> Please find my answers, notes in-line below under the GIM>> tag.
>
> Regards,
> Greg
>
> On Fri, Jun 26, 2020 at 10:34 PM Charlie Kaufman <
> charliekaufman@outlook.com> wrote:
>
>> I have reviewed this document as part of the security directorate's
>> ongoing effort to review all IETF documents being processed by the IESG.
>> These comments were written primarily for the benefit of the security area
>> directors.  Document editors and WG chairs should treat these comments just
>> like any other last call comments.
>>
>> This I-D specifies extensions to the STAMP protocol defined in RFC 8762.
>> The STAMP protocol runs over UDP and is similar to an "echo" protocol
>> intended to be used to test network speed and bandwidth. This I-D specifies
>> a series of TLV encoded extensions that can be appended to the end of the
>> UDP packets of the STAMP protocol (as well as defining the TLV mechanism
>> itself).
>>
>> I could not find anything objectionable from a security standpoint in
>> this extension mechanism. It is a bit odd that when extensions are added to
>> an HMAC protected packet, instead of adding the extensions before the HMAC
>> and having the HMAC protect the entire contents, they keep the existing
>> HMAC that protects the base packet and add a second HMAC at the end of the
>> extensions that protects only the extensions. This would potentially allow
>> an attacker to "mix and match" the extensions from one packet with the base
>> content of a different packet, but it's not clear what an attacker might be
>> able to gain by doing that.
>>
> GIM>> I think that the STAMP YANG data model could be used to minimize the
> possible attack vector you've described. We will certainly keep that as one
> of the objectives when updating draft-ietf-ippm-stamp-yang
> <https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp-yang/>. Also,
> HMAC TLV might be required even in unauthenticated STAMP mode to protect
> the integrity on a certain TLV(s). Do you see this as a useful scenario or
> unnecessary feature?
>
>>
>> One of the pieces of information an extension can request is the 6 byte
>> MAC address of the incoming packet as seen by the peer (which will normally
>> by the MAC address of the last router on the path). That information is not
>> normally available to someone on a distant network, but it's not obvious
>> what harm could come from their knowing it.
>>
> GIM>> As mentioned above, HMAC TLV may follow some STAMP TLVs. Do you
> think that the document should recommend using HMAC TLV with the Location
> TLV?
>
>>
>> The protocol can also request the source and destination IP addresses as
>> seen by the peer (presumably to detect NAT gateways), but the protocol
>> assumes the originator will know whether the peer will see IPv4 or IPv6
>> addresses, so dealing with 6-to-4 gateways could be tricky.
>>
>> On page 19 table 2, this document asks IANA to assign extension type
>> codes. In all other documents of this sort that I have seen, the document
>> assigns the codes and asks IANA to track subsequent additions.
>>
> GIM>> Martin Duke, the Responsible AD for IPPM WG, asked this question in
> his review. He has agreed to leave the text as-is since no one asked for a
> particular number.
>
>>
>> On some kinds of errors, the protocol specifies that the error is
>> reported via and ICMP message. For others, it specifies that a field be
>> returned containing all zeros. It's probably better to report errors "in
>> band" because so many routers swallow ICMP messages. The spec does not -
>> and should - specify what to do if the length of the TLV coded extensions
>> does not match the length of the UDP packet containing them (or at least I
>> couldn't find where it was specified).
>>
> GIM>> Thank you for pointing out this awkward handling. We had continued
> discussion with Martin Duke and Rakesh Gandhi on improving the mechanism of
> reporting TLV errors. The discussion is in the updated Section 4 of the new
> working version and is copied below:
> 4.  TLV Extensions to STAMP
>
>    Type-Length-Value (TLV) encoding scheme provides a flexible extension
>    mechanism for optional informational elements.  TLV is an optional
>    field in the STAMP test packet.  Multiple TLVs MAY be placed in the
>    STAMP test packet.  A TLV MAY be enclosed in a TLV.  TLVs have the
>    two octets long Type field, two octets long Length field that is
>    equal to the length of the Value field in octets.  If a Type value
>    for TLV or sub-TLV is in the range for Vendor Private Use, the Length
>    MUST be at least 4, and the first four octets MUST be that vendor's
>    the Structure of Management Information (SMI) Private Enterprise
>    Codes, as recorded in IANA's SMI Private Enterprise Codes sub-
>    registry, in network octet order.  The rest of the Value field is
>    private to the vendor.  The following sections describe the use of
>    TLVs for STAMP that extends STAMP capability beyond its base
>    specification.
>
>        0                   1                   2                   3
>        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
>       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>       |U|L|R|R|R|R|R|R|     Type      |           Length              |
>       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>       ~                            Value                              ~
>       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>
>               Figure 5: TLV Format in a STAMP Extended Packet
>
>    where fields are defined as the following:
>
>    o  U - a one-bit flag, located as specified in Section 5.2.  A
>       Session-Sender MUST set the U flag to 0 before transmitting an
>       extended STAMP test packet.  A Session-Reflector MUST set the U
>       flag to 1 if the Session-Reflector has not understood the TLV.
>
>    o  L - a one-bit flag, located as specified in Section 5.2.  A
>       Session-Sender MUST set the L flag to 0 before transmitting an
>       extended STAMP test packet.  A Session-Reflector MUST set the L
>       flag to 1 if the Session-Reflector determined the TLV is
>       malformed, i.e., the Length field value of the fixed-size TLV is
>       not equal to the value defined for the particular type, or the
>       remaining length of the extended STAMP packet is less than the
>       size of the TLV.
>
>    o  R - reserved flags for future use.  These flags MUST be zeroed on
>       transmit and ignored on receipt.
>
>    o  Type - one-octet long field that characterizes the interpretation
>       of the Value field.  It is allocated by IANA, as specified in
>       Section 5.1
>
>    o  Length - two-octets long field equals length on the Value field in
>       octets.
>
>    o  Value - a variable-length field.  Its interpretation and encoding
>       determined by the value of the Type field.
>
>    A STAMP node, whether Session-Sender or Session-Reflector, receiving
>    a test packet MUST determine whether the packet is a base STAMP
>    packet or includes one or more TLVs.  The node MUST compare the value
>    in the Length field of the UDP header and the length of the base
>    STAMP test packet in the mode, unauthenticated or authenticated based
>    on the configuration of the particular STAMP test session.  If the
>    difference between the two values is larger than the length of UDP
>    header, then the test packet includes one or more STAMP TLVs that
>    immediately follow the base STAMP test packet.
>
>    A system that has received a STAMP test packet with extension TLVs
>    MUST validate each TLV:
>
>       if the U flag is set, the STAMP system MUST skip the processing of
>       the TLV.  The implementation MUST try to process the next TLV if
>       present in the extended STAMP packet.
>
>       if the L flag is set, the STAMP system MUST stop processing the
>       remainder of the extended STAMP packet.
>
>       if an implementation of a Session-Reflector does not recognize the
>       Type field value, it MUST include the copy of the TLV into the
>       reflected STAMP packet.  The Session-Reflector MUST set the U flag
>       to 1.  The Session-Reflector MUST try to process the next TLV in
>       the extended STAMP packet;
>
>       if a TLV is malformed, the processing of extension TLVs MUST be
>       stopped.  The Session-Reflector MUST copy the remainder of the
>       received extended STAMP packet into the reflected STAMP packet.
>       The Session-Reflector MUST set the L flag to 1.
>
>    Detected error events MUST be logged.  Note that rate of logging MUST
>    be controlled.
>
> Please note, that IANA is also requested to create a STAMP TLV Flags
> sub-registry.
> We hope this is an acceptable solution. Always welcome your questions,
> comments, and suggestions.
>
>
>> --Charlie
>>
>

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<div dir=3D"ltr">Hi Charlie,<div>you might be interested to know that anoth=
er case of using ICMP in our document was pointed out in LC comments. That =
was used to report a failure of HMAC authentication verification. The autho=
rs discussed it and have agreed to use a new STAMP TLV Flag. You can find u=
pdates (also addressing GenART IETF LC comments by Dan Romascanu) in the at=
tached copies of the working version of the draft and the diff to -06.</div=
><div>I greatly appreciate your consideration and feedback.</div><div><br><=
/div><div>Regards,</div><div>Greg</div></div><br><div class=3D"gmail_quote"=
><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Jun 29, 2020 at 1:19 PM Greg=
 Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com">gregimirsky@gmail.com<=
/a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0=
px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><=
div dir=3D"ltr"><div dir=3D"ltr">Hi Charlie,<div>thank you for your thoroug=
h review, detailed questions, and thoughtful=C2=A0suggestions. We&#39;ve di=
scussed your comments and propose changes that are described below. Also, y=
ou can find the changes highlighted in the attached diff between the -06 an=
d the new working version of the document. Please find my answers, notes in=
-line below under the GIM&gt;&gt; tag.</div><div><br></div><div>Regards,</d=
iv><div>Greg</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" cla=
ss=3D"gmail_attr">On Fri, Jun 26, 2020 at 10:34 PM Charlie Kaufman &lt;<a h=
ref=3D"mailto:charliekaufman@outlook.com" target=3D"_blank">charliekaufman@=
outlook.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex">




<div dir=3D"ltr">
<div style=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color=
:rgb(0,0,0)">
<span>I have reviewed this document as part of the security directorate&#39=
;s ongoing effort to review all IETF documents being processed by the IESG.=
=C2=A0 These comments were written primarily for the benefit of the securit=
y area directors.=C2=A0 Document editors and WG
 chairs should treat these comments just like any other last call comments.=
<br>
</span>
<div><br>
</div>
<div>This I-D specifies extensions to the STAMP protocol defined in RFC 876=
2. The STAMP protocol runs over UDP and is similar to an &quot;echo&quot; p=
rotocol intended to be used to test network speed and bandwidth. This I-D s=
pecifies a series of TLV encoded extensions
 that can be appended to the end of the UDP packets of the STAMP protocol (=
as well as defining the TLV mechanism itself).<br>
</div>
<div><br>
</div>
<div>I could not find anything objectionable from a security standpoint in =
this extension mechanism. It is a bit odd that when extensions are added to=
 an HMAC protected packet, instead of adding the extensions before the HMAC=
 and having the HMAC protect the
 entire contents, they keep the existing HMAC that protects the base packet=
 and add a second HMAC at the end of the extensions that protects only the =
extensions. This would potentially allow an attacker to &quot;mix and match=
&quot; the extensions from one packet with
 the base content of a different packet, but it&#39;s not clear what an att=
acker might be able to gain by doing that.<br></div></div></div></blockquot=
e><div>GIM&gt;&gt; I think that the STAMP YANG data model could be used to =
minimize the possible attack vector you&#39;ve described. We will certainly=
 keep that as one of the objectives when updating <a href=3D"https://datatr=
acker.ietf.org/doc/draft-ietf-ippm-stamp-yang/" target=3D"_blank">draft-iet=
f-ippm-stamp-yang</a>.=C2=A0Also, HMAC TLV might be required even in unauth=
enticated STAMP mode to protect the integrity on a certain TLV(s). Do you s=
ee this as a useful scenario or unnecessary feature?</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div style=3D"font-family=
:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"><div>
</div>
<div><br>
</div>
<div>One of the pieces of information an extension can request is the 6 byt=
e MAC address of the incoming packet as seen by the peer (which will normal=
ly by the MAC address of the last router on the path). That information is =
not normally available to someone
 on a distant network, but it&#39;s not obvious what harm could come from t=
heir knowing it.<br></div></div></div></blockquote><div>GIM&gt;&gt; As ment=
ioned above, HMAC TLV may follow some STAMP TLVs. Do you think that the=C2=
=A0document should recommend using HMAC TLV with the Location TLV?</div><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-lef=
t:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div style=
=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0=
)"><div>
</div>
<div><br>
</div>
<div>The protocol can also request the source and destination IP addresses =
as seen by the peer (presumably to detect NAT gateways), but the protocol a=
ssumes the originator will know whether the peer will see IPv4 or IPv6 addr=
esses, so dealing with 6-to-4 gateways
 could be tricky.<br>
</div>
<div><br>
</div>
<div>On page 19 table 2, this document asks IANA to assign extension type c=
odes. In all other documents of this sort that I have seen, the document as=
signs the codes and asks IANA to track subsequent additions.<br></div></div=
></div></blockquote><div>GIM&gt;&gt; Martin Duke, the Responsible AD for IP=
PM WG, asked this question in his review. He has agreed to leave the text a=
s-is since no one asked for a particular number.</div><blockquote class=3D"=
gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(20=
4,204,204);padding-left:1ex"><div dir=3D"ltr"><div style=3D"font-family:Cal=
ibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"><div>
</div>
<div><br>
</div>
<div>On some kinds of errors, the protocol specifies that the error is repo=
rted via and ICMP message. For others, it specifies that a field be returne=
d containing all zeros. It&#39;s probably better to report errors &quot;in =
band&quot; because so many routers swallow ICMP
 messages. The spec does not - and should - specify what to do if the lengt=
h of the TLV coded extensions does not match the length of the UDP packet c=
ontaining them (or at least I couldn&#39;t find where it was specified).<br=
></div></div></div></blockquote><div>GIM&gt;&gt; Thank you for pointing out=
 this awkward handling. We had continued discussion with Martin Duke and Ra=
kesh Gandhi on improving the mechanism of reporting TLV errors. The discuss=
ion is in the updated Section 4 of the new working version and is copied be=
low:</div><div>4.=C2=A0 TLV Extensions to STAMP<br><br>=C2=A0 =C2=A0Type-Le=
ngth-Value (TLV) encoding scheme provides a flexible extension<br>=C2=A0 =
=C2=A0mechanism for optional informational elements.=C2=A0 TLV is an option=
al<br>=C2=A0 =C2=A0field in the STAMP test packet.=C2=A0 Multiple TLVs MAY =
be placed in the<br>=C2=A0 =C2=A0STAMP test packet.=C2=A0 A TLV MAY be encl=
osed in a TLV.=C2=A0 TLVs have the<br>=C2=A0 =C2=A0two octets long Type fie=
ld, two octets long Length field that is<br>=C2=A0 =C2=A0equal to the lengt=
h of the Value field in octets.=C2=A0 If a Type value<br>=C2=A0 =C2=A0for T=
LV or sub-TLV is in the range for Vendor Private Use, the Length<br>=C2=A0 =
=C2=A0MUST be at least 4, and the first four octets MUST be that vendor&#39=
;s<br>=C2=A0 =C2=A0the Structure of Management Information (SMI) Private En=
terprise<br>=C2=A0 =C2=A0Codes, as recorded in IANA&#39;s SMI Private Enter=
prise Codes sub-<br>=C2=A0 =C2=A0registry, in network octet order.=C2=A0 Th=
e rest of the Value field is<br>=C2=A0 =C2=A0private to the vendor.=C2=A0 T=
he following sections describe the use of<br>=C2=A0 =C2=A0TLVs for STAMP th=
at extends STAMP capability beyond its base<br>=C2=A0 =C2=A0specification.<=
br><br>=C2=A0 =C2=A0 =C2=A0 =C2=A00 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 1 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=
 =C2=A0 =C2=A0 2 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 3<br>=C2=A0 =C2=A0 =C2=A0 =C2=A00 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 =
8 9 0 1 2 3 4 5 6 7 8 9 0 1<br>=C2=A0 =C2=A0 =C2=A0 +-+-+-+-+-+-+-+-+-+-+-+=
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+<br>=C2=A0 =C2=A0 =C2=A0 |U|L|R|R=
|R|R|R|R| =C2=A0 =C2=A0 Type =C2=A0 =C2=A0 =C2=A0| =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 Length =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0|<br>=C2=
=A0 =C2=A0 =C2=A0 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+=
-+-+-+-+<br>=C2=A0 =C2=A0 =C2=A0 ~ =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Value =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0~<br>=C2=A0 =C2=A0 =C2=A0 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+=
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+<br><br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 Figure 5: TLV Format in a STAMP Extended Packet<br><br>=
=C2=A0 =C2=A0where fields are defined as the following:<br><br>=C2=A0 =C2=
=A0o =C2=A0U - a one-bit flag, located as specified in Section 5.2. =C2=A0A=
<br>=C2=A0 =C2=A0 =C2=A0 Session-Sender MUST set the U flag to 0 before tra=
nsmitting an<br>=C2=A0 =C2=A0 =C2=A0 extended STAMP test packet.=C2=A0 A Se=
ssion-Reflector MUST set the U<br>=C2=A0 =C2=A0 =C2=A0 flag to 1 if the Ses=
sion-Reflector has not understood the TLV.<br><br>=C2=A0 =C2=A0o =C2=A0L - =
a one-bit flag, located as specified in Section 5.2. =C2=A0A<br>=C2=A0 =C2=
=A0 =C2=A0 Session-Sender MUST set the L flag to 0 before transmitting an<b=
r>=C2=A0 =C2=A0 =C2=A0 extended STAMP test packet.=C2=A0 A Session-Reflecto=
r MUST set the L<br>=C2=A0 =C2=A0 =C2=A0 flag to 1 if the Session-Reflector=
 determined the TLV is<br>=C2=A0 =C2=A0 =C2=A0 malformed, i.e., the Length =
field value of the fixed-size TLV is<br>=C2=A0 =C2=A0 =C2=A0 not equal to t=
he value defined for the particular type, or the<br>=C2=A0 =C2=A0 =C2=A0 re=
maining length of the extended STAMP packet is less than the<br>=C2=A0 =C2=
=A0 =C2=A0 size of the TLV.<br><br>=C2=A0 =C2=A0o =C2=A0R - reserved flags =
for future use.=C2=A0 These flags MUST be zeroed on<br>=C2=A0 =C2=A0 =C2=A0=
 transmit and ignored on receipt.<br><br>=C2=A0 =C2=A0o =C2=A0Type - one-oc=
tet long field that characterizes the interpretation<br>=C2=A0 =C2=A0 =C2=
=A0 of the Value field.=C2=A0 It is allocated by IANA, as specified in<br>=
=C2=A0 =C2=A0 =C2=A0 Section 5.1<br><br>=C2=A0 =C2=A0o =C2=A0Length - two-o=
ctets long field equals length on the Value field in<br>=C2=A0 =C2=A0 =C2=
=A0 octets.<br><br>=C2=A0 =C2=A0o =C2=A0Value - a variable-length field.=C2=
=A0 Its interpretation and encoding<br>=C2=A0 =C2=A0 =C2=A0 determined by t=
he value of the Type field.<br><br>=C2=A0 =C2=A0A STAMP node, whether Sessi=
on-Sender or Session-Reflector, receiving<br>=C2=A0 =C2=A0a test packet MUS=
T determine whether the packet is a base STAMP<br>=C2=A0 =C2=A0packet or in=
cludes one or more TLVs.=C2=A0 The node MUST compare the value<br>=C2=A0 =
=C2=A0in the Length field of the UDP header and the length of the base<br>=
=C2=A0 =C2=A0STAMP test packet in the mode, unauthenticated or authenticate=
d based<br>=C2=A0 =C2=A0on the configuration of the particular STAMP test s=
ession.=C2=A0 If the<br>=C2=A0 =C2=A0difference between the two values is l=
arger than the length of UDP<br>=C2=A0 =C2=A0header, then the test packet i=
ncludes one or more STAMP TLVs that<br>=C2=A0 =C2=A0immediately follow the =
base STAMP test packet.</div><div><br>=C2=A0 =C2=A0A system that has receiv=
ed a STAMP test packet with extension TLVs<br>=C2=A0 =C2=A0MUST validate ea=
ch TLV:<br><br>=C2=A0 =C2=A0 =C2=A0 if the U flag is set, the STAMP system =
MUST skip the processing of<br>=C2=A0 =C2=A0 =C2=A0 the TLV.=C2=A0 The impl=
ementation MUST try to process the next TLV if<br>=C2=A0 =C2=A0 =C2=A0 pres=
ent in the extended STAMP packet.<br><br>=C2=A0 =C2=A0 =C2=A0 if the L flag=
 is set, the STAMP system MUST stop processing the<br>=C2=A0 =C2=A0 =C2=A0 =
remainder of the extended STAMP packet.<br><br>=C2=A0 =C2=A0 =C2=A0 if an i=
mplementation of a Session-Reflector does not recognize the<br>=C2=A0 =C2=
=A0 =C2=A0 Type field value, it MUST include the copy of the TLV into the<b=
r>=C2=A0 =C2=A0 =C2=A0 reflected STAMP packet.=C2=A0 The Session-Reflector =
MUST set the U flag<br>=C2=A0 =C2=A0 =C2=A0 to 1.=C2=A0 The Session-Reflect=
or MUST try to process the next TLV in<br>=C2=A0 =C2=A0 =C2=A0 the extended=
 STAMP packet;<br><br>=C2=A0 =C2=A0 =C2=A0 if a TLV is malformed, the proce=
ssing of extension TLVs MUST be<br>=C2=A0 =C2=A0 =C2=A0 stopped.=C2=A0 The =
Session-Reflector MUST copy the remainder of the<br>=C2=A0 =C2=A0 =C2=A0 re=
ceived extended STAMP packet into the reflected STAMP packet.<br>=C2=A0 =C2=
=A0 =C2=A0 The Session-Reflector MUST set the L flag to 1.<br><br>=C2=A0 =
=C2=A0Detected error events MUST be logged.=C2=A0 Note that rate of logging=
 MUST<br>=C2=A0 =C2=A0be controlled.<br></div><div><br></div><div> Please n=
ote, that IANA is also requested to create a STAMP TLV Flags sub-registry.<=
/div><div>We hope this is an acceptable solution. Always welcome your quest=
ions, comments, and suggestions.=C2=A0<br></div><div><br></div><blockquote =
class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px sol=
id rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div style=3D"font-f=
amily:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"><div>
</div>
<div><br>
</div>
<span>--Charlie</span><br>
</div>
</div>

</blockquote></div></div>
</blockquote></div>

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From nobody Thu Jul  2 15:30:27 2020
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Subject: [secdir] Secdir last call review of draft-ietf-mpls-sfl-framework-08
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Reviewer: Tero Kivinen
Review result: Has Issues

I have reviewed this document as part of the security directorate's ongoing
effort to review all IETF documents being processed by the IESG.  These
comments were written primarily for the benefit of the security area
directors.  Document editors and WG chairs should treat these comments just
like any other last call comments.

This document describes a way to make synonyms for MPLS flows so those
flows can be processed differently. It does include privacy considerations
which says that depending on how the synonyms are used there might
be privacy issues. 

It does claim in the security considerations section that there is no new
security issues associated with the MPLS dataplane. I think that is not true.
If there is any kind of different processing depending which synonym
is used that can be used to bypass that processing by using the another
synonym instead of the intended one. For example if attacker knows 
that specific synonym causes deep packet inspection (one of the examples
given), and he might want to use the synonym which bypasses this 
inspection, in case he is sending things he does not want to be 
inspected. This could be some kind of malicious code somehow
loaded to the sending device or something.

On the other hand my understanding that trust model of MPLS
is mostly we blindly trust everything other end says, so someone
able to use different synonyms are most likely also able to do 
other even worse things, but I think there are new things caused
by this addition than what is already present in the MPLS now.




From nobody Thu Jul  2 15:37:56 2020
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Review instructions and related resources are at:
http://tools.ietf.org/area/sec/trac/wiki/SecDirReview

For telechat 2020-07-09

Reviewer               LC end     Draft
Stephen Farrell        2020-06-15 draft-ietf-pim-igmp-mld-snooping-yang-15
Daniel Gillmor         2020-06-12 draft-ietf-pce-stateful-pce-lsp-scheduling-18
Phillip Hallam-Baker   2020-06-11 draft-ietf-dots-use-cases-24
Christian Huitema     R2020-06-25 draft-ietf-i2rs-yang-l2-network-topology-14
Russ Mundy             2020-01-02 draft-ietf-dprive-bcp-op-11

Last calls:

Reviewer               LC end     Draft
John Bradley           2020-02-28 draft-ietf-regext-data-escrow-10
Donald Eastlake       R2019-11-14 draft-ietf-hip-dex-20
Donald Eastlake        2020-02-27 draft-ietf-6tisch-msf-16
Stephen Farrell        2020-06-15 draft-ietf-pim-igmp-mld-snooping-yang-15
Daniel Franke          2020-03-09 draft-ietf-regext-dnrd-objects-mapping-08
Daniel Gillmor         2020-06-12 draft-ietf-pce-stateful-pce-lsp-scheduling-18
Phillip Hallam-Baker   2020-06-11 draft-ietf-dots-use-cases-24
Dan Harkins            None       draft-ietf-rtgwg-policy-model-03
Christian Huitema     R2020-06-25 draft-ietf-i2rs-yang-l2-network-topology-14
Leif Johansson         2020-07-08 draft-ietf-lsr-isis-invalid-tlv-02
Scott Kelly            2020-07-06 draft-ietf-pce-pcep-flowspec-09
Chris Lonvick          2020-07-03 draft-ietf-bess-evpn-inter-subnet-forwarding-09
Aanchal Malhotra       2020-07-27 draft-allan-5g-fmc-encapsulation-04
David Mandelberg       2020-07-14 draft-ietf-idr-rfc8203bis-06
Catherine Meadows      2020-07-09 draft-ietf-lamps-rfc7030est-clarify-07
Adam Montville         2020-07-09 draft-ietf-acme-email-smime-08
Russ Mundy             2020-01-02 draft-ietf-dprive-bcp-op-11
Vincent Roca           2020-04-23 draft-ietf-detnet-ip-over-mpls-06
Stefan Santesson       2020-05-04 draft-ietf-httpbis-header-structure-19
Tina Tsou              2020-05-08 draft-ietf-httpbis-client-hints-14
Samuel Weiler          2020-06-11 draft-ietf-trill-multilevel-single-nickname-11
Brian Weis             2020-05-26 draft-ietf-cose-hash-algs-04
Klaas Wierenga         2020-05-26 draft-ietf-kitten-krb-spake-preauth-09
Paul Wouters           2020-05-25 draft-ietf-capport-architecture-08
Liang Xia             R2020-07-16 draft-ietf-cellar-ffv1-16
Dacheng Zhang          2020-03-12 draft-nottingham-how-did-that-get-into-the-repo-01
Dacheng Zhang          2019-11-05 draft-ietf-mpls-ri-rsvp-frr-07

Next in the reviewer rotation:

  Alexey Melnikov
  Adam Montville
  Kathleen Moriarty
  Russ Mundy
  Sandra Murphy
  Yoav Nir
  Magnus Nystrom
  Hilarie Orman
  Radia Perlman
  Derrell Piper




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From: Ana Minaburo <ana@ackl.io>
Date: Fri, 3 Jul 2020 09:54:01 +0200
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To: "Pascal Thubert (pthubert)" <pthubert@cisco.com>, lp-wan <lp-wan@ietf.org>, secdir@ietf.org,  last-call@ietf.org, draft-ietf-lpwan-coap-static-context-hc.all@ietf.org,  Benjamin Kaduk <kaduk@mit.edu>, Paul Wouters <paul@nohats.ca>, Roman Danyliw <rdd@cert.org>, The IESG <iesg@ietf.org>
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Subject: [secdir] Answer to: review draft-ietf-lpwan-coap-static-context-hc-12
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--0000000000008ed9e105a984d5fa
Content-Type: text/plain; charset="UTF-8"

Dear all,

Thanks for reviewing our draft, we have been working the Security Section.
This new version reflects the fact that SCHC CoAP compression may not be
managed by the same entity as the IP/UDP compression.

We have published the version -14 with this new text:
Security considerations

*When applied to LPWAN, the Security Considerations of SCHC header
compression RFC8724 are valid for SCHC CoAP header compression. When CoAP
uses OSCORE, the security considerations defined in RFC8613 does not change
when SCHC header compression is applied.*

The definition of SCHC over CoAP header fields permits the compression of
header information only. The SCHC header compression itself does not
increase or reduce the level of security in the communication. When the
connection does not use any security protocol as OSCORE, DTLS, or other, it
is highly necessary to use a layer two security.

DoS attacks are possible if an intruder can introduce a compressed SCHC
corrupted packet onto the link and cause a compression efficiency
reduction. However, an intruder having the ability to add corrupted packets
at the link layer raises additional security issues than those related to
the use of header compression.

SCHC compression returns variable-length Residues for some CoAP fields. In
the compressed header, the length sent is not the original header field
length but the length of the Residue. So if a corrupted packet comes to the
decompressor with a longer or shorter length than the one in the original
header, SCHC decompression will detect an error and drops the packet.

*OSCORE compression is also based on the same compression method described
in {{rfc8724}}. The size of the Initialisation Vector (IV) residue must be
considered carefully. A residue size obtained with LSB CDA over the IV has
an impact on the compression efficiency and the frequency the device will
renew its key. This operation requires several exchanges and is
energy-consuming.*

SCHC header and compression Rules MUST remain tightly coupled. Otherwise,
an encrypted residue may be decompressed differently by the receiver. To
avoid this situation, if the Rule is modified in one location, the OSCORE
keys MUST be re-established.

----

Regards

Ana, Laurent & Ricardo

--0000000000008ed9e105a984d5fa
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div class=3D"gmail_quote"><div dir=3D"ltr"><div class=3D"=
gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr"><br></div><div dir=3D"lt=
r">Dear all,<div><br></div><div>Thanks for reviewing our draft, we have bee=
n working the Security Section. This new version reflects the fact that SCH=
C CoAP compression may not be managed by the same entity as the IP/UDP comp=
ression.</div><div><br></div><div>We have published the version -14 with th=
is new text:</div><div><h1 style=3D"box-sizing:border-box;margin:24px 0px 1=
6px;line-height:1.25;padding-bottom:0.3em;border-bottom:1px solid rgb(234,2=
36,239);color:rgb(36,41,46);font-family:-apple-system,system-ui,&quot;Segoe=
 UI&quot;,Helvetica,Arial,sans-serif,&quot;Apple Color Emoji&quot;,&quot;Se=
goe UI Emoji&quot;"><font size=3D"2">Security considerations=C2=A0</font></=
h1><p style=3D"box-sizing:border-box;margin-top:0px;margin-bottom:16px;colo=
r:rgb(36,41,46);font-family:-apple-system,system-ui,&quot;Segoe UI&quot;,He=
lvetica,Arial,sans-serif,&quot;Apple Color Emoji&quot;,&quot;Segoe UI Emoji=
&quot;"><b>When applied to LPWAN, the Security Considerations of SCHC heade=
r compression RFC8724 are valid for SCHC CoAP header compression. When CoAP=
 uses OSCORE, the security considerations defined in RFC8613 does not chang=
e when SCHC header compression is applied.</b></p><p style=3D"box-sizing:bo=
rder-box;margin-top:0px;margin-bottom:16px;color:rgb(36,41,46);font-family:=
-apple-system,system-ui,&quot;Segoe UI&quot;,Helvetica,Arial,sans-serif,&qu=
ot;Apple Color Emoji&quot;,&quot;Segoe UI Emoji&quot;">The definition of SC=
HC over CoAP header fields permits the compression of header information on=
ly. The SCHC header compression itself does not increase or reduce the leve=
l of security in the communication. When the connection does not use any se=
curity protocol as OSCORE, DTLS, or other, it is highly necessary to use a =
layer two security.</p><p style=3D"box-sizing:border-box;margin-top:0px;mar=
gin-bottom:16px;color:rgb(36,41,46);font-family:-apple-system,system-ui,&qu=
ot;Segoe UI&quot;,Helvetica,Arial,sans-serif,&quot;Apple Color Emoji&quot;,=
&quot;Segoe UI Emoji&quot;">DoS attacks are possible if an intruder can int=
roduce a compressed SCHC corrupted packet onto the link and cause a compres=
sion efficiency reduction. However, an intruder having the ability to add c=
orrupted packets at the link layer raises additional security issues than t=
hose related to the use of header compression.</p><p style=3D"box-sizing:bo=
rder-box;margin-top:0px;margin-bottom:16px;color:rgb(36,41,46);font-family:=
-apple-system,system-ui,&quot;Segoe UI&quot;,Helvetica,Arial,sans-serif,&qu=
ot;Apple Color Emoji&quot;,&quot;Segoe UI Emoji&quot;">SCHC compression ret=
urns variable-length Residues for some CoAP fields. In the compressed heade=
r, the length sent is not the original header field length but the length o=
f the Residue. So if a corrupted packet comes to the decompressor with a lo=
nger or shorter length than the one in the original header, SCHC decompress=
ion will detect an error and drops the packet.</p><p style=3D"box-sizing:bo=
rder-box;margin-top:0px;margin-bottom:16px;color:rgb(36,41,46);font-family:=
-apple-system,system-ui,&quot;Segoe UI&quot;,Helvetica,Arial,sans-serif,&qu=
ot;Apple Color Emoji&quot;,&quot;Segoe UI Emoji&quot;"><b>OSCORE compressio=
n is also based on the same compression method described in {{rfc8724}}. Th=
e size of the Initialisation Vector (IV) residue must be considered careful=
ly. A residue size obtained with LSB CDA over the IV has an impact on the c=
ompression efficiency and the frequency the device will renew its key. This=
 operation requires several exchanges and is energy-consuming.</b></p><p st=
yle=3D"box-sizing:border-box;margin-top:0px;margin-bottom:16px;color:rgb(36=
,41,46);font-family:-apple-system,system-ui,&quot;Segoe UI&quot;,Helvetica,=
Arial,sans-serif,&quot;Apple Color Emoji&quot;,&quot;Segoe UI Emoji&quot;">=
SCHC header and compression Rules MUST remain tightly coupled. Otherwise, a=
n encrypted residue may be decompressed differently by the receiver. To avo=
id this situation, if the Rule is modified in one location, the OSCORE keys=
 MUST be re-established.</p><p style=3D"box-sizing:border-box;margin-top:0p=
x;margin-bottom:16px;color:rgb(36,41,46);font-family:-apple-system,system-u=
i,&quot;Segoe UI&quot;,Helvetica,Arial,sans-serif,&quot;Apple Color Emoji&q=
uot;,&quot;Segoe UI Emoji&quot;">----</p><p style=3D"box-sizing:border-box;=
margin-top:0px;margin-bottom:16px;color:rgb(36,41,46);font-family:-apple-sy=
stem,system-ui,&quot;Segoe UI&quot;,Helvetica,Arial,sans-serif,&quot;Apple =
Color Emoji&quot;,&quot;Segoe UI Emoji&quot;">Regards</p><p style=3D"box-si=
zing:border-box;margin-top:0px;margin-bottom:16px;color:rgb(36,41,46);font-=
family:-apple-system,system-ui,&quot;Segoe UI&quot;,Helvetica,Arial,sans-se=
rif,&quot;Apple Color Emoji&quot;,&quot;Segoe UI Emoji&quot;">Ana, Laurent =
&amp; Ricardo</p><p style=3D"box-sizing:border-box;margin-top:0px;margin-bo=
ttom:16px;color:rgb(36,41,46);font-family:-apple-system,system-ui,&quot;Seg=
oe UI&quot;,Helvetica,Arial,sans-serif,&quot;Apple Color Emoji&quot;,&quot;=
Segoe UI Emoji&quot;"><br></p></div></div>
</div></div>
</div></div>

--0000000000008ed9e105a984d5fa--


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To: "secdir@ietf.org" <secdir@ietf.org>, "iesg@ietf.org" <iesg@ietf.org>, draft-ietf-bess-evpn-inter-subnet-forwarding.all@ietf.org
From: Chris Lonvick <lonvick.ietf@gmail.com>
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Date: Sun, 5 Jul 2020 16:39:53 -0500
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Archived-At: <https://mailarchive.ietf.org/arch/msg/secdir/ezcik3UgvUl7HVNYqy7ScQIXrt0>
Subject: [secdir] SECDIR review of draft-ietf-bess-evpn-inter-subnet-forwarding-09
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Hello,

I have reviewed this document as part of the security directorate's 
ongoing effort to review all IETF documents being processed by the IESG. 
These comments were written primarily for the benefit of the security 
area directors. Document editors and WG chairs should treat these 
comments just like any other last call comments. The summary of the 
review is Ready.

The Security Considerations section is a bit light but adequate. It 
would be good if the authors could make a statement similar to that made 
in RFC 7432. Something like, "Security considerations discussed in 
[applicable RFCs] apply to this document. ... This section describes 
additional considerations."

Best regards,
Chris


From nobody Sun Jul  5 14:49:22 2020
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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Sun, 5 Jul 2020 17:48:24 -0400
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Subject: [secdir] SECDIR review of draft-ietf-6tisch-msf-16
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I have reviewed this document as part of the security directorate's ongoing
effort to review all IETF documents being processed by the IESG.  Document
editors and WG chairs should treat these comments just like any other
comments. Sorry this review is so late.

The summary of the review is Ready with a minor issue.

Security:

I have no objection to anything in the Security Considerations section.
However, I find it odd that this section does not mention confidentiality
or authentication at all. I think it needs a few words added. Perhaps, in
the first paragraph of the Security Considerations section, the following
change, assuming it is correct:
"The security considrations of the specifications continue to apply in the
MSF scope." -> "Confidentiality and authentication of MSF control and data
traffic is provided by these specifications whose security considerations
continue to apply to MSF."

Nits:

Section 2, top of page 5: garble. ",wh ile" -> ", while".

Section 3, page 6:

   - "the AutoTxCell and AutoRxCell are collided" -> "the AutoTxCell and
   AutoRxCell collide"
   - "In case in a backs-off period" -> "When in a back-off period"
   - "autonomous cells take precedence over negotiated cell" -> "autonomous
   cells take precedence over negotiated cells"
   - "possible for negotiated cell" -> "possible for a negotiated cell"

Section 5, page 9: "Without specific declaring, all cells" -> "Without
specific declaration, all cells" or just "All cells"

Section 5.1, page 9: ", most cases" -> ", in most cases"

Section 5.2, top of page 11:

   - "For burst traffic type" -> "For bursty traffic"
   - "It is recommended to set MAX_NUM_CELLS value at least 4x of the
   maximum number of used cells in a slot frame in recent history." ->
   "Setting MAC_NUM_CELLS to a value at least 4x the recent maximum number of
   cells used in a slot frame is RECOMMENDED."

There are references to outdated drafts. I usually just omit the version
number in my drafts that reference other drafts eliminating this.

Thanks,
Donald
===============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 2386 Panoramic Circle, Apopka, FL 32703 USA
 d3e3e3@gmail.com

--00000000000059d2b605a9b8b822
Content-Type: text/html; charset="UTF-8"
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<div dir=3D"ltr">I have reviewed this document as part of the security dire=
ctorate&#39;s ongoing effort to review all IETF documents being processed b=
y the IESG.=C2=A0 Document editors and WG chairs should treat these comment=
s just like any other comments. Sorry this review is so late.<br><br>The su=
mmary of the review is Ready with a minor issue.<div><br>Security:<br><br>I=
 have no objection to anything in the Security Considerations section. Howe=
ver, I find it odd that this section does not mention confidentiality or au=
thentication at all. I think=C2=A0it needs a few words added. Perhaps, in t=
he first paragraph of the Security Considerations section, the following ch=
ange, assuming it is correct:</div><div><font face=3D"arial, sans-serif">&q=
uot;<span style=3D"color:rgb(0,0,0);font-size:13.3333px">The security</span=
></font><span style=3D"font-family:arial,sans-serif;color:rgb(0,0,0);font-s=
ize:13.3333px">=C2=A0</span>considrations<span style=3D"font-family:arial,s=
ans-serif;color:rgb(0,0,0);font-size:13.3333px"> of the specifications cont=
inue to apply in the MSF</span><font face=3D"arial, sans-serif" style=3D"co=
lor:rgb(0,0,0);font-size:13.3333px">=C2=A0scope.&quot; </font><span style=
=3D"color:rgb(0,0,0);font-size:13.3333px">-&gt; &quot;Confidentiality and a=
uthentication of MSF control and data traffic is provided by these specific=
ations whose security considerations continue to apply to MSF.&quot;</span>=
<span style=3D"font-family:arial,sans-serif;color:rgb(0,0,0);font-size:13.3=
333px"><br></span><br>Nits:<br><br>Section 2, top of page 5: garble. &quot;=
,wh ile&quot; -&gt; &quot;, while&quot;.<br><br>Section 3, page 6:<br><ul><=
li>&quot;the AutoTxCell and AutoRxCell are collided&quot; -&gt; &quot;the A=
utoTxCell and AutoRxCell collide&quot;</li><li>&quot;In case in a backs-off=
 period&quot; -&gt; &quot;When in a back-off period&quot;</li><li>&quot;aut=
onomous cells take precedence over negotiated cell&quot; -&gt; &quot;autono=
mous cells take precedence over negotiated cells&quot;</li><li>&quot;possib=
le for negotiated cell&quot; -&gt; &quot;possible for a negotiated cell&quo=
t;</li></ul>Section 5, page 9: &quot;Without specific=C2=A0declaring, all c=
ells&quot; -&gt; &quot;Without specific=C2=A0declaration, all cells&quot; o=
r just &quot;All cells&quot;<br><br>Section 5.1, page 9: &quot;, most cases=
&quot; -&gt; &quot;, in most cases&quot;<div><br></div><div>Section 5.2, to=
p of page 11:</div><div><ul><li>&quot;For burst traffic type&quot; -&gt; &q=
uot;For bursty traffic&quot;</li><li><font face=3D"arial, sans-serif">&quot=
;<span style=3D"color:rgb(0,0,0);font-size:13.3333px">It is recommended to =
set MAX_NUM_CELLS value at</span></font><span style=3D"font-family:arial,sa=
ns-serif;color:rgb(0,0,0);font-size:13.3333px">=C2=A0least 4x of the maximu=
m number of used cells in a slot frame in</span><font face=3D"arial, sans-s=
erif" style=3D"color:rgb(0,0,0);font-size:13.3333px">=C2=A0recent history.&=
quot; -</font><span style=3D"color:rgb(0,0,0);font-size:13.3333px">&gt; &qu=
ot;Setting MAC_NUM_CELLS to a value at least 4x the recent=C2=A0maximum num=
ber of cells used in a=C2=A0slot frame is RECOMMENDED.&quot;</span></li></u=
l></div><div>There are references to outdated drafts. I usually just omit t=
he version number in my drafts that reference other drafts eliminating this=
.<div><br>Thanks,<br>Donald<br>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>=C2=A0Donald E. East=
lake 3rd =C2=A0 +1-508-333-2270 (cell)<br>=C2=A02386 Panoramic Circle, Apop=
ka, FL 32703 USA<br>=C2=A0<a href=3D"mailto:d3e3e3@gmail.com">d3e3e3@gmail.=
com</a></div></div></div></div>

--00000000000059d2b605a9b8b822--


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I have reviewed this document as part of the security directorate's ongoing=
 effort to review all IETF documents being processed by the IESG.  These co=
mments were written primarily for the benefit of the security area director=
s.  Document editors and WG chairs should treat these comments just like an=
y other last call comments.=0A=0AThe summary of the review is ready. =0A=0A=
>From the abstract, "This document specifies a set of extensions to PCEP to =
support dissemination of Flow Specifications.  This allows a PCE to indicat=
e what traffic should be placed on each path that it is aware of."=0A=0AThe=
 security considerations section says that this mechanism has all of the sa=
me security considerations of the underlying PCEP protocol, and that all of=
 the same security considerations in RFC5440, RFC6952, and RFC8253 apply. I=
t also mentions some additional privacy considerations, and that order of i=
nstallation for overlapping flow specs may have unexpected consequences tha=
t could be exploited by an attacker.=0A=0AI don't have additional concerns.=
=0A=0A


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From: Donald Eastlake <d3e3e3@gmail.com>
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Subject: [secdir] SECDIR Re-Reveiw of draft-ietf-hip-dex
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Hi,

I have checked the current -20 version of this draft against my previous
review below. All my comments are resolved except that I think the plural
of SHOULD is SHOULDs, not SHOULDS, and there are still occurrences of
SHOULDS in Appendix B of the draft.

Thanks,
Donald
===============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 2386 Panoramic Circle, Apopka, FL 32703 USA
 d3e3e3@gmail.com

---------- Forwarded message ---------
From: Donald Eastlake <d3e3e3@gmail.com>
Date: Mon, Jan 20, 2020 at 11:18 PM
Subject: SECDIR Reveiw of draft-ietf-hip-dex-11
To: <draft-ietf-hip-dex.all@ietf.org>
Cc: iesg@ietf.org <iesg@ietf.org>, secdir <secdir@ietf.org>

I have reviewed this document as (a very late) part of the security
directorate's ongoing effort to review all IETF documents being
processed by the IESG.

The summary of the review is Ready with Nits.

Sorry to get this review in so late but, while approved by the IESG,
the draft is still in revised draft needed state so this may do some
good. On the security front, although the draft is pretty complex and
I am not that familiar with HIP, I did not see any significant
security issues that were not already called out in the draft. So I
concentrated on possible editorial issues.

Editorial:

Section 1.1, 3rd paragraph, page 5. Delete "However," a the beginning
of the 2nd sentence. It doesn't make sense.

Section 2.3, Definitions should be in alphabetic order.

Section 2.3: It seems to me that people who are puzzled about what
something means are most likely to be puzzled by the acronym. So I
would put the acronym first, where there is an acronym or acronym-like
term to use, then the expansion in parenthesis or in the body of the
definition. This done for a couple of entries like CMAC and CKDF but
most are the other way.

Section 3 last paragraph and Section 12.10 5th bullet: "to use" -> "use of"

I think OGA  and KEYMAT should be in the Definitions list and KEYMAT,
which I assume just is short for "keying material", should be expanded
on first use in Section 6.3. Alternatively, you could just replace all
occurrences of KEYMAT with "Keying Material".

Section 5.3.2, page 23. The first sentence of the first paragraph
starting on that page has problems. Maybe "chose" should be "choses"
but I'm not sure:
  "The DH_GROUP_LIST parameter contains the Responder's order of
   preference based on which the Responder chose the ECDH key contained
   in the HOST_ID parameter (see below)."

Appendix A, first sentence, "allows to identify" -> "allows identifying"

Appendix B, "IEDG" -> "IESG"

Appendix B, around the middle of page 51, right after the line
beginning with "Section 6," there are three line with a blank line
before and after. I found this confusing at first. I suggest those
three line also be indented.

Appendix B, page 52, "SHOUDS" -> "SHOUDs"

Thanks,
Donald
===============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 2386 Panoramic Circle, Apopka, FL 32703 USA
 d3e3e3@gmail.com

--000000000000a76bb405a9bcaa1a
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>Hi,</div><div><br></div><div>I have checked the curre=
nt -20 version of this draft against my previous review below. All my comme=
nts are resolved except that I think the plural of SHOULD is SHOULDs, not S=
HOULDS, and there are still occurrences=C2=A0of SHOULDS in Appendix B of th=
e draft.<br></div><div><br></div><div><div dir=3D"ltr" data-smartmail=3D"gm=
ail_signature">Thanks,<br>Donald<br>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>=C2=A0Donald E. E=
astlake 3rd =C2=A0 +1-508-333-2270 (cell)<br>=C2=A02386 Panoramic Circle, A=
popka, FL 32703 USA<br>=C2=A0<a href=3D"mailto:d3e3e3@gmail.com" target=3D"=
_blank">d3e3e3@gmail.com</a></div></div><br><div class=3D"gmail_quote"><div=
 dir=3D"ltr" class=3D"gmail_attr">---------- Forwarded message ---------<br=
>From: <strong class=3D"gmail_sendername" dir=3D"auto">Donald Eastlake</str=
ong> <span dir=3D"auto">&lt;<a href=3D"mailto:d3e3e3@gmail.com" target=3D"_=
blank">d3e3e3@gmail.com</a>&gt;</span><br>Date: Mon, Jan 20, 2020 at 11:18 =
PM<br>Subject: SECDIR Reveiw of draft-ietf-hip-dex-11<br>To:  &lt;<a href=
=3D"mailto:draft-ietf-hip-dex.all@ietf.org" target=3D"_blank">draft-ietf-hi=
p-dex.all@ietf.org</a>&gt;<br>Cc: <a href=3D"mailto:iesg@ietf.org" target=
=3D"_blank">iesg@ietf.org</a> &lt;<a href=3D"mailto:iesg@ietf.org" target=
=3D"_blank">iesg@ietf.org</a>&gt;, secdir &lt;<a href=3D"mailto:secdir@ietf=
.org" target=3D"_blank">secdir@ietf.org</a>&gt;<br></div><br>I have reviewe=
d this document as (a very late) part of the security<br>
directorate&#39;s ongoing effort to review all IETF documents being<br>
processed by the IESG.<br>
<br>
The summary of the review is Ready with Nits.<br>
<br>
Sorry to get this review in so late but, while approved by the IESG,<br>
the draft is still in revised draft needed state so this may do some<br>
good. On the security front, although the draft is pretty complex and<br>
I am not that familiar with HIP, I did not see any significant<br>
security issues that were not already called out in the draft. So I<br>
concentrated on possible editorial issues.<br>
<br>
Editorial:<br>
<br>
Section 1.1, 3rd paragraph, page 5. Delete &quot;However,&quot; a the begin=
ning<br>
of the 2nd sentence. It doesn&#39;t make sense.<br>
<br>
Section 2.3, Definitions should be in alphabetic order.<br>
<br>
Section 2.3: It seems to me that people who are puzzled about what<br>
something means are most likely to be puzzled by the acronym. So I<br>
would put the acronym first, where there is an acronym or acronym-like<br>
term to use, then the expansion in parenthesis or in the body of the<br>
definition. This done for a couple of entries like CMAC and CKDF but<br>
most are the other way.<br>
<br>
Section 3 last paragraph and Section 12.10 5th bullet: &quot;to use&quot; -=
&gt; &quot;use of&quot;<br>
<br>
I think OGA=C2=A0 and KEYMAT should be in the Definitions list and KEYMAT,<=
br>
which I assume just is short for &quot;keying material&quot;, should be exp=
anded<br>
on first use in Section 6.3. Alternatively, you could just replace all<br>
occurrences of KEYMAT with &quot;Keying Material&quot;.<br>
<br>
Section 5.3.2, page 23. The first sentence of the first paragraph<br>
starting on that page has problems. Maybe &quot;chose&quot; should be &quot=
;choses&quot;<br>
but I&#39;m not sure:<br>
=C2=A0 &quot;The DH_GROUP_LIST parameter contains the Responder&#39;s order=
 of<br>
=C2=A0 =C2=A0preference based on which the Responder chose the ECDH key con=
tained<br>
=C2=A0 =C2=A0in the HOST_ID parameter (see below).&quot;<br>
<br>
Appendix A, first sentence, &quot;allows to identify&quot; -&gt; &quot;allo=
ws identifying&quot;<br>
<br>
Appendix B, &quot;IEDG&quot; -&gt; &quot;IESG&quot;<br>
<br>
Appendix B, around the middle of page 51, right after the line<br>
beginning with &quot;Section 6,&quot; there are three line with a blank lin=
e<br>
before and after. I found this confusing at first. I suggest those<br>
three line also be indented.<br>
<br>
Appendix B, page 52, &quot;SHOUDS&quot; -&gt; &quot;SHOUDs&quot;<br>
<br>
Thanks,<br>
Donald<br>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D<br>
=C2=A0Donald E. Eastlake 3rd=C2=A0 =C2=A0+1-508-333-2270 (cell)<br>
=C2=A02386 Panoramic Circle, Apopka, FL 32703 USA<br>
=C2=A0<a href=3D"mailto:d3e3e3@gmail.com" target=3D"_blank">d3e3e3@gmail.co=
m</a><br>
</div></div>

--000000000000a76bb405a9bcaa1a--


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From: "Eric Vyncke (evyncke)" <evyncke@cisco.com>
To: Donald Eastlake <d3e3e3@gmail.com>, "iesg@ietf.org" <iesg@ietf.org>, secdir <secdir@ietf.org>, "draft-ietf-hip-dex.all@ietf.org" <draft-ietf-hip-dex.all@ietf.org>, "secdir-secretary@mit.org" <secdir-secretary@mit.org>
Thread-Topic: SECDIR Re-Reveiw of draft-ietf-hip-dex
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Date: Mon, 6 Jul 2020 13:52:00 +0200 (CEST)
From: Tengfei Chang <tengfei.chang@inria.fr>
To: Donald Eastlake <d3e3e3@gmail.com>
Cc: iesg <iesg@ietf.org>, secdir <secdir@ietf.org>,  draft-ietf-6tisch-msf all <draft-ietf-6tisch-msf.all@ietf.org>
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Hi Donald, 

Thanks for your review on the MSF! It's never late. 
I have resolved your comments according to the suggestion and created a new version on my local. 

One question, should I publish the new version right away or I should wait for more comments? 
Thanks! 

Tengfei 

Stay Healthy! Stay Optimistic! 

Dr. Tengfei Chang 
Post-doctoral Researcher 
Wireless Networking for Evolving & Adaptive Applications (EVA) 
National Inst. for Research in Comp. Sci. and Automation ( Inria ) 
(+33)1 80 49 41 43 
tengfei.chang@inria.fr 
www.tchang.org 
____________________ 

> From: "Donald Eastlake" <d3e3e3@gmail.com>
> To: "iesg" <iesg@ietf.org>, "secdir" <secdir@ietf.org>, "draft-ietf-6tisch-msf
> all" <draft-ietf-6tisch-msf.all@ietf.org>
> Sent: Sunday, July 5, 2020 11:48:24 PM
> Subject: SECDIR review of draft-ietf-6tisch-msf-16

> I have reviewed this document as part of the security directorate's ongoing
> effort to review all IETF documents being processed by the IESG. Document
> editors and WG chairs should treat these comments just like any other comments.
> Sorry this review is so late.

> The summary of the review is Ready with a minor issue.

> Security:

> I have no objection to anything in the Security Considerations section. However,
> I find it odd that this section does not mention confidentiality or
> authentication at all. I think it needs a few words added. Perhaps, in the
> first paragraph of the Security Considerations section, the following change,
> assuming it is correct:
> " The security considrations of the specifications continue to apply in the MSF
> scope." -> "Confidentiality and authentication of MSF control and data traffic
> is provided by these specifications whose security considerations continue to
> apply to MSF."

> Nits:

> Section 2, top of page 5: garble. ",wh ile" -> ", while".

> Section 3, page 6:

>    * "the AutoTxCell and AutoRxCell are collided" -> "the AutoTxCell and AutoRxCell
>     collide"
>     * "In case in a backs-off period" -> "When in a back-off period"
>    * "autonomous cells take precedence over negotiated cell" -> "autonomous cells
>     take precedence over negotiated cells"
>     * "possible for negotiated cell" -> "possible for a negotiated cell"

> Section 5, page 9: "Without specific declaring, all cells" -> "Without specific
> declaration, all cells" or just "All cells"

> Section 5.1, page 9: ", most cases" -> ", in most cases"
> Section 5.2, top of page 11:

>     * "For burst traffic type" -> "For bursty traffic"
>    * " It is recommended to set MAX_NUM_CELLS value at least 4x of the maximum
>    number of used cells in a slot frame in recent history." - > "Setting
>    MAC_NUM_CELLS to a value at least 4x the recent maximum number of cells used in
>     a slot frame is RECOMMENDED."
> There are references to outdated drafts. I usually just omit the version number
> in my drafts that reference other drafts eliminating this.

> Thanks,
> Donald
> ===============================
> Donald E. Eastlake 3rd +1-508-333-2270 (cell)
> 2386 Panoramic Circle, Apopka, FL 32703 USA
> [ mailto:d3e3e3@gmail.com | d3e3e3@gmail.com ]

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<html><body><div style=3D"font-family: arial, helvetica, sans-serif; font-s=
ize: 10pt; color: #000000"><div>Hi Donald,</div><div><br data-mce-bogus=3D"=
1"></div><div>Thanks for your&nbsp;review on the MSF! It's never late.</div=
><div>I have resolved your comments according to the suggestion and created=
 a new version on my local.</div><div><br data-mce-bogus=3D"1"></div><div>O=
ne&nbsp;question, should I publish the new version right away or I should w=
ait for more comments?</div><div>Thanks!</div><div><br></div><div>Tengfei</=
div><div data-marker=3D"__SIG_PRE__"><div><br></div><div><hr></div><div>
</div><div><span face=3D"arial black, avant garde" data-mce-style=3D"font-f=
amily: 'arial black', 'avant garde';" style=3D"font-family: 'arial black', =
'avant garde';"><span style=3D"font-size: 12px;" data-mce-style=3D"font-siz=
e: 12px;">Stay Healthy! Stay Optimistic!</span></span><br></div><div><span =
style=3D"font-family: 'arial black', 'avant garde';" data-mce-style=3D"font=
-family: 'arial black', 'avant garde';"><span style=3D"font-size: 12px;" da=
ta-mce-style=3D"font-size: 12px;"><br></span></span></div><div><span style=
=3D"font-family: 'arial black', 'avant garde'; font-size: 9pt;" data-mce-st=
yle=3D"font-family: 'arial black', 'avant garde'; font-size: 9pt;"><span st=
yle=3D"vertical-align: inherit;" data-mce-style=3D"vertical-align: inherit;=
"><span style=3D"vertical-align: inherit;" data-mce-style=3D"vertical-align=
: inherit;">Dr. Tengfei Chang</span></span></span></div><div>
</div><div><span style=3D"font-family: 'lucida console', sans-serif; font-s=
ize: 9pt;" data-mce-style=3D"font-family: 'lucida console', sans-serif; fon=
t-size: 9pt;"><span style=3D"vertical-align: inherit; font-family: 'courier=
 new', courier, monaco, monospace, sans-serif;" data-mce-style=3D"vertical-=
align: inherit; font-family: 'courier new', courier, monaco, monospace, san=
s-serif;"><span style=3D"vertical-align: inherit;" data-mce-style=3D"vertic=
al-align: inherit;">Post-doctoral Researcher</span></span><br></span></div>=
<div>
</div><div><span style=3D"font-size: 9pt;" data-mce-style=3D"font-size: 9pt=
;"><span style=3D"font-family: arial, sans-serif;" data-mce-style=3D"font-f=
amily: arial, sans-serif;"><span style=3D"font-family: 'courier new', couri=
er, monaco, monospace, sans-serif;" data-mce-style=3D"font-family: 'courier=
 new', courier, monaco, monospace, sans-serif;"><span style=3D"vertical-ali=
gn: inherit;" data-mce-style=3D"vertical-align: inherit;"><span style=3D"ve=
rtical-align: inherit;" data-mce-style=3D"vertical-align: inherit;">Wireles=
s</span></span></span> <span style=3D"font-family: 'courier new', courier, =
monaco, monospace, sans-serif;" data-mce-style=3D"font-family: 'courier new=
', courier, monaco, monospace, sans-serif;"><span style=3D"vertical-align: =
inherit;" data-mce-style=3D"vertical-align: inherit;"><span style=3D"vertic=
al-align: inherit;" data-mce-style=3D"vertical-align: inherit;">Networking =
for&nbsp;</span></span></span></span><span style=3D"font-family: 'courier n=
ew', courier, monaco, monospace, sans-serif;" data-mce-style=3D"font-family=
: 'courier new', courier, monaco, monospace, sans-serif;"><span style=3D"ve=
rtical-align: inherit;" data-mce-style=3D"vertical-align: inherit;"><span s=
tyle=3D"vertical-align: inherit;" data-mce-style=3D"vertical-align: inherit=
;">Evolving&nbsp;&amp; Adaptive&nbsp;Applications (EVA)</span></span></span=
><br></span></div><div>
</div><div><span style=3D"font-size: 9pt;" data-mce-style=3D"font-size: 9pt=
;"><span style=3D"font-family: 'courier new', courier, monaco, monospace, s=
ans-serif;" data-mce-style=3D"font-family: 'courier new', courier, monaco, =
monospace, sans-serif;"></span><span style=3D"font-family: 'courier new', c=
ourier, monaco, monospace, sans-serif;" data-mce-style=3D"font-family: 'cou=
rier new', courier, monaco, monospace, sans-serif;"><span style=3D"vertical=
-align: inherit;" data-mce-style=3D"vertical-align: inherit;"><span style=
=3D"vertical-align: inherit;" data-mce-style=3D"vertical-align: inherit;">N=
ational Inst. for Research in Comp. Sci. and Automation</span></span><span =
style=3D"color: #222222; font-family: sans-serif;" data-mce-style=3D"color:=
 #222222; font-family: sans-serif;"><span style=3D"vertical-align: inherit;=
" data-mce-style=3D"vertical-align: inherit;"><span style=3D"vertical-align=
: inherit;" data-mce-style=3D"vertical-align: inherit;">&nbsp;(</span></spa=
n></span><span style=3D"vertical-align: inherit;" data-mce-style=3D"vertica=
l-align: inherit;"><span style=3D"vertical-align: inherit;" data-mce-style=
=3D"vertical-align: inherit;">Inria</span></span><span style=3D"color: #222=
222; font-family: sans-serif;" data-mce-style=3D"color: #222222; font-famil=
y: sans-serif;"><span style=3D"vertical-align: inherit;" data-mce-style=3D"=
vertical-align: inherit;"><span style=3D"vertical-align: inherit;" data-mce=
-style=3D"vertical-align: inherit;">)</span></span></span><br></span></span=
></div><div>
</div><div><span style=3D"font-family: 'courier new', courier, monaco, mono=
space, sans-serif; font-size: 9pt;" data-mce-style=3D"font-family: 'courier=
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nherit;">(+33)1&nbsp;80 49 41 43</span></span></span></div><div>
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ospace, sans-serif;"><span style=3D"vertical-align: inherit;" data-mce-styl=
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</div><div><span style=3D"font-size: 9pt; font-family: 'courier new', couri=
er, monaco, monospace, sans-serif;" data-mce-style=3D"font-size: 9pt; font-=
family: 'courier new', courier, monaco, monospace, sans-serif;"><span style=
=3D"vertical-align: inherit;" data-mce-style=3D"vertical-align: inherit;"><=
span style=3D"vertical-align: inherit;" data-mce-style=3D"vertical-align: i=
nherit;">www.tchang.org</span></span></span></div><div>
</div><div><span style=3D"vertical-align: inherit;" data-mce-style=3D"verti=
cal-align: inherit;"><span style=3D"vertical-align: inherit;" data-mce-styl=
e=3D"vertical-align: inherit;">____________________</span></span></div><div=
>
</div><div><img src=3D"cid:18903971cf0aea3523207c5edcea150b643fa958@zimbra"=
 doc=3D"Briefcase/inria.jpg"></div><div>
</div><div><span style=3D"font-family: 'courier new', courier, monaco, mono=
space, sans-serif; font-size: 10pt;" data-mce-style=3D"font-family: 'courie=
r new', courier, monaco, monospace, sans-serif; font-size: 10pt;">&nbsp;</s=
pan></div></div><br><hr id=3D"zwchr" data-marker=3D"__DIVIDER__"><div data-=
marker=3D"__HEADERS__"><blockquote style=3D"border-left: 2px solid #1010FF;=
 margin-left: 5px; padding-left: 5px; color: #000; font-weight: normal; fon=
t-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-s=
erif; font-size: 12pt;" data-mce-style=3D"border-left: 2px solid #1010FF; m=
argin-left: 5px; padding-left: 5px; color: #000; font-weight: normal; font-=
style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-ser=
if; font-size: 12pt;"><b>From: </b>"Donald Eastlake" &lt;d3e3e3@gmail.com&g=
t;<br><b>To: </b>"iesg" &lt;iesg@ietf.org&gt;, "secdir" &lt;secdir@ietf.org=
&gt;, "draft-ietf-6tisch-msf all" &lt;draft-ietf-6tisch-msf.all@ietf.org&gt=
;<br><b>Sent: </b>Sunday, July 5, 2020 11:48:24 PM<br><b>Subject: </b>SECDI=
R review of draft-ietf-6tisch-msf-16<br></blockquote></div><div data-marker=
=3D"__QUOTED_TEXT__"><blockquote style=3D"border-left: 2px solid #1010FF; m=
argin-left: 5px; padding-left: 5px; color: #000; font-weight: normal; font-=
style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-ser=
if; font-size: 12pt;" data-mce-style=3D"border-left: 2px solid #1010FF; mar=
gin-left: 5px; padding-left: 5px; color: #000; font-weight: normal; font-st=
yle: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif=
; font-size: 12pt;"><div dir=3D"ltr">I have reviewed this document as part =
of the security directorate's ongoing effort to review all IETF documents b=
eing processed by the IESG.&nbsp; Document editors and WG chairs should tre=
at these comments just like any other comments. Sorry this review is so lat=
e.<br><br>The summary of the review is Ready with a minor issue.<div><br>Se=
curity:<br><br>I have no objection to anything in the Security Consideratio=
ns section. However, I find it odd that this section does not mention confi=
dentiality or authentication at all. I think&nbsp;it needs a few words adde=
d. Perhaps, in the first paragraph of the Security Considerations section, =
the following change, assuming it is correct:</div><div><span face=3D"arial=
, sans-serif" data-mce-style=3D"font-family: arial, sans-serif;" style=3D"f=
ont-family: arial, sans-serif;">"<span style=3D"color: #000000; font-size: =
13.3333px;" data-mce-style=3D"color: #000000; font-size: 13.3333px;">The se=
curity</span></span><span style=3D"font-family: arial,sans-serif; color: #0=
00000; font-size: 13.3333px;" data-mce-style=3D"font-family: arial,sans-ser=
if; color: #000000; font-size: 13.3333px;">&nbsp;</span>considrations<span =
style=3D"font-family: arial,sans-serif; color: #000000; font-size: 13.3333p=
x;" data-mce-style=3D"font-family: arial,sans-serif; color: #000000; font-s=
ize: 13.3333px;"> of the specifications continue to apply in the MSF</span>=
<span face=3D"arial, sans-serif" data-mce-style=3D"color: #000000; font-siz=
e: 13.3333px; font-family: arial, sans-serif;" style=3D"color: #000000; fon=
t-size: 13.3333px; font-family: arial, sans-serif;">&nbsp;scope." </span><s=
pan style=3D"color: #000000; font-size: 13.3333px;" data-mce-style=3D"color=
: #000000; font-size: 13.3333px;">-&gt; "Confidentiality and authentication=
 of MSF control and data traffic is provided by these specifications whose =
security considerations continue to apply to MSF."</span><span style=3D"fon=
t-family: arial,sans-serif; color: #000000; font-size: 13.3333px;" data-mce=
-style=3D"font-family: arial,sans-serif; color: #000000; font-size: 13.3333=
px;"><br></span><br>Nits:<br><br>Section 2, top of page 5: garble. ",wh ile=
" -&gt; ", while".<br><br>Section 3, page 6:<br><ul><li>"the AutoTxCell and=
 AutoRxCell are collided" -&gt; "the AutoTxCell and AutoRxCell collide"</li=
><li>"In case in a backs-off period" -&gt; "When in a back-off period"</li>=
<li>"autonomous cells take precedence over negotiated cell" -&gt; "autonomo=
us cells take precedence over negotiated cells"</li><li>"possible for negot=
iated cell" -&gt; "possible for a negotiated cell"</li></ul>Section 5, page=
 9: "Without specific&nbsp;declaring, all cells" -&gt; "Without specific&nb=
sp;declaration, all cells" or just "All cells"<br><br>Section 5.1, page 9: =
", most cases" -&gt; ", in most cases"<br><div>Section 5.2, top of page 11:=
</div><div><ul><li>"For burst traffic type" -&gt; "For bursty traffic"</li>=
<li><span face=3D"arial, sans-serif" data-mce-style=3D"font-family: arial, =
sans-serif;" style=3D"font-family: arial, sans-serif;">"<span style=3D"colo=
r: #000000; font-size: 13.3333px;" data-mce-style=3D"color: #000000; font-s=
ize: 13.3333px;">It is recommended to set MAX_NUM_CELLS value at</span></sp=
an><span style=3D"font-family: arial,sans-serif; color: #000000; font-size:=
 13.3333px;" data-mce-style=3D"font-family: arial,sans-serif; color: #00000=
0; font-size: 13.3333px;">&nbsp;least 4x of the maximum number of used cell=
s in a slot frame in</span><span face=3D"arial, sans-serif" data-mce-style=
=3D"color: #000000; font-size: 13.3333px; font-family: arial, sans-serif;" =
style=3D"color: #000000; font-size: 13.3333px; font-family: arial, sans-ser=
if;">&nbsp;recent history." -</span><span style=3D"color: #000000; font-siz=
e: 13.3333px;" data-mce-style=3D"color: #000000; font-size: 13.3333px;">&gt=
; "Setting MAC_NUM_CELLS to a value at least 4x the recent&nbsp;maximum num=
ber of cells used in a&nbsp;slot frame is RECOMMENDED."</span></li></ul></d=
iv><div>There are references to outdated drafts. I usually just omit the ve=
rsion number in my drafts that reference other drafts eliminating this.<div=
><br>Thanks,<br>Donald<br>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<br>&nbsp;Donald E. Eastlake 3=
rd &nbsp; +1-508-333-2270 (cell)<br>&nbsp;2386 Panoramic Circle, Apopka, FL=
 32703 USA<br>&nbsp;<a href=3D"mailto:d3e3e3@gmail.com" target=3D"_blank">d=
3e3e3@gmail.com</a></div></div></div></div><br></blockquote></div></div></b=
ody></html>
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--=_2e977d3e-4fc1-4a3c-9e41-e7b38713c5e7--


From nobody Mon Jul  6 07:24:25 2020
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Reviewer: Catherine Meadows
Review result: Has Nits

I have reviewed this document as part of the security directorate's ongoing
effort to review all IETF documents being processed by the IESG.  Document
editors and WG chairs should treat these comments just like any other comments.

This draft sets forth changes to the syntax of Enrollment over Secure Transport
(EST) (RFC7030) to fix some errors and ambiguities that resulted in
interoperability issues.  RFC7030 also includes a form of header that has been
deprecated in other RFC’s.  This document thus deprecates that header as well.

Since the only changes to the draft makes to the syntax are either to clarify
ambiguities in the descriptions and to deprecate syntax that has already
deprecated by other RFC’s, it presents no new security or privacy concerns. 
However, I found a few typos, etc. that I am listing below.  They are all of
the sort that would be missed by a spell checker.   I don’t know if I got all
of them, so I’d suggest another round or proofreading.

I consider this document Ready with Nits.

Abstract

some errata that was reported

should be

some errata that were reported

This document fixes some
   syntactical errors in ASN.1 that was presented

assuming that the word “was” refers to the errors, that should be

This document fixes some
   syntactical errors in ASN.1 that were presented

In the Privacy Considerations Section

This document does not disclose any additional identifies

should be

This document does not disclose any additional identities



From nobody Mon Jul  6 08:07:43 2020
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From: Stephen Farrell via Datatracker <noreply@ietf.org>
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Reviewer: Stephen Farrell
Review result: Ready

To the extent that a quick scan of the text (all I had time for) can help with 
checking a yang model, I didn't see anything here that needs addressing.



From nobody Mon Jul  6 09:18:05 2020
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From: Roman Danyliw <rdd@cert.org>
To: Stephen Farrell <stephen.farrell@cs.tcd.ie>, "secdir@ietf.org" <secdir@ietf.org>
CC: "draft-ietf-pim-igmp-mld-snooping-yang.all@ietf.org" <draft-ietf-pim-igmp-mld-snooping-yang.all@ietf.org>
Thread-Topic: [Last-Call] Secdir last call review of draft-ietf-pim-igmp-mld-snooping-yang-15
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Subject: Re: [secdir] [Last-Call] Secdir last call review of draft-ietf-pim-igmp-mld-snooping-yang-15
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Hi Stephen, thank you for the review.

I balloted No Comment suggesting a few minor clarifications in the Security=
 Considerations section.=20

Regards,
Roman

> -----Original Message-----
> From: last-call <last-call-bounces@ietf.org> On Behalf Of Stephen Farrell=
 via
> Datatracker
> Sent: Monday, July 6, 2020 11:08 AM
> To: secdir@ietf.org
> Cc: last-call@ietf.org; draft-ietf-pim-igmp-mld-snooping-yang.all@ietf.or=
g;
> pim@ietf.org
> Subject: [Last-Call] Secdir last call review of draft-ietf-pim-igmp-mld-s=
nooping-
> yang-15
>=20
> Reviewer: Stephen Farrell
> Review result: Ready
>=20
> To the extent that a quick scan of the text (all I had time for) can help=
 with
> checking a yang model, I didn't see anything here that needs addressing.
>=20
>=20
> --
> last-call mailing list
> last-call@ietf.org
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From nobody Mon Jul  6 11:58:06 2020
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To: Catherine Meadows <catherine.meadows@nrl.navy.mil>
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--=-=-=
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Catherine Meadows via Datatracker <noreply@ietf.org> wrote:
    > I consider this document Ready with Nits.

I have submitted -08 with the three corrections you noted.
Thank you.

    > This document does not disclose any additional identifies

This is amusing, given that identities often identify.
Thank you for noticing.

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-

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From nobody Mon Jul  6 12:17:04 2020
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Mon, 6 Jul 2020 12:16:32 -0700
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To: Charlie Kaufman <charliekaufman@outlook.com>
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Subject: Re: [secdir] Secdir review of draft-ietf-ippm-stamp-option-tlv-06
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Hi Charlie,
I hope this note finds you well.
How have you found the proposed updates to the draft? Do you think that
your comments have been addressed by the proposed changes? Please let me
know if you have any further questions. I greatly appreciate your feedback.
Attached please find the current working version and the diff with -06.

Regards,
Greg

On Thu, Jul 2, 2020 at 12:30 PM Greg Mirsky <gregimirsky@gmail.com> wrote:

> Hi Charlie,
> you might be interested to know that another case of using ICMP in our
> document was pointed out in LC comments. That was used to report a failure
> of HMAC authentication verification. The authors discussed it and have
> agreed to use a new STAMP TLV Flag. You can find updates (also addressing
> GenART IETF LC comments by Dan Romascanu) in the attached copies of the
> working version of the draft and the diff to -06.
> I greatly appreciate your consideration and feedback.
>
> Regards,
> Greg
>
> On Mon, Jun 29, 2020 at 1:19 PM Greg Mirsky <gregimirsky@gmail.com> wrote:
>
>> Hi Charlie,
>> thank you for your thorough review, detailed questions, and
>> thoughtful suggestions. We've discussed your comments and propose changes
>> that are described below. Also, you can find the changes highlighted in the
>> attached diff between the -06 and the new working version of the document.
>> Please find my answers, notes in-line below under the GIM>> tag.
>>
>> Regards,
>> Greg
>>
>> On Fri, Jun 26, 2020 at 10:34 PM Charlie Kaufman <
>> charliekaufman@outlook.com> wrote:
>>
>>> I have reviewed this document as part of the security directorate's
>>> ongoing effort to review all IETF documents being processed by the IESG.
>>> These comments were written primarily for the benefit of the security area
>>> directors.  Document editors and WG chairs should treat these comments just
>>> like any other last call comments.
>>>
>>> This I-D specifies extensions to the STAMP protocol defined in RFC 8762.
>>> The STAMP protocol runs over UDP and is similar to an "echo" protocol
>>> intended to be used to test network speed and bandwidth. This I-D specifies
>>> a series of TLV encoded extensions that can be appended to the end of the
>>> UDP packets of the STAMP protocol (as well as defining the TLV mechanism
>>> itself).
>>>
>>> I could not find anything objectionable from a security standpoint in
>>> this extension mechanism. It is a bit odd that when extensions are added to
>>> an HMAC protected packet, instead of adding the extensions before the HMAC
>>> and having the HMAC protect the entire contents, they keep the existing
>>> HMAC that protects the base packet and add a second HMAC at the end of the
>>> extensions that protects only the extensions. This would potentially allow
>>> an attacker to "mix and match" the extensions from one packet with the base
>>> content of a different packet, but it's not clear what an attacker might be
>>> able to gain by doing that.
>>>
>> GIM>> I think that the STAMP YANG data model could be used to minimize
>> the possible attack vector you've described. We will certainly keep that as
>> one of the objectives when updating draft-ietf-ippm-stamp-yang
>> <https://datatracker.ietf.org/doc/draft-ietf-ippm-stamp-yang/>. Also,
>> HMAC TLV might be required even in unauthenticated STAMP mode to protect
>> the integrity on a certain TLV(s). Do you see this as a useful scenario or
>> unnecessary feature?
>>
>>>
>>> One of the pieces of information an extension can request is the 6 byte
>>> MAC address of the incoming packet as seen by the peer (which will normally
>>> by the MAC address of the last router on the path). That information is not
>>> normally available to someone on a distant network, but it's not obvious
>>> what harm could come from their knowing it.
>>>
>> GIM>> As mentioned above, HMAC TLV may follow some STAMP TLVs. Do you
>> think that the document should recommend using HMAC TLV with the Location
>> TLV?
>>
>>>
>>> The protocol can also request the source and destination IP addresses as
>>> seen by the peer (presumably to detect NAT gateways), but the protocol
>>> assumes the originator will know whether the peer will see IPv4 or IPv6
>>> addresses, so dealing with 6-to-4 gateways could be tricky.
>>>
>>> On page 19 table 2, this document asks IANA to assign extension type
>>> codes. In all other documents of this sort that I have seen, the document
>>> assigns the codes and asks IANA to track subsequent additions.
>>>
>> GIM>> Martin Duke, the Responsible AD for IPPM WG, asked this question in
>> his review. He has agreed to leave the text as-is since no one asked for a
>> particular number.
>>
>>>
>>> On some kinds of errors, the protocol specifies that the error is
>>> reported via and ICMP message. For others, it specifies that a field be
>>> returned containing all zeros. It's probably better to report errors "in
>>> band" because so many routers swallow ICMP messages. The spec does not -
>>> and should - specify what to do if the length of the TLV coded extensions
>>> does not match the length of the UDP packet containing them (or at least I
>>> couldn't find where it was specified).
>>>
>> GIM>> Thank you for pointing out this awkward handling. We had continued
>> discussion with Martin Duke and Rakesh Gandhi on improving the mechanism of
>> reporting TLV errors. The discussion is in the updated Section 4 of the new
>> working version and is copied below:
>> 4.  TLV Extensions to STAMP
>>
>>    Type-Length-Value (TLV) encoding scheme provides a flexible extension
>>    mechanism for optional informational elements.  TLV is an optional
>>    field in the STAMP test packet.  Multiple TLVs MAY be placed in the
>>    STAMP test packet.  A TLV MAY be enclosed in a TLV.  TLVs have the
>>    two octets long Type field, two octets long Length field that is
>>    equal to the length of the Value field in octets.  If a Type value
>>    for TLV or sub-TLV is in the range for Vendor Private Use, the Length
>>    MUST be at least 4, and the first four octets MUST be that vendor's
>>    the Structure of Management Information (SMI) Private Enterprise
>>    Codes, as recorded in IANA's SMI Private Enterprise Codes sub-
>>    registry, in network octet order.  The rest of the Value field is
>>    private to the vendor.  The following sections describe the use of
>>    TLVs for STAMP that extends STAMP capability beyond its base
>>    specification.
>>
>>        0                   1                   2                   3
>>        0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
>>       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>       |U|L|R|R|R|R|R|R|     Type      |           Length              |
>>       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>       ~                            Value                              ~
>>       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>>
>>               Figure 5: TLV Format in a STAMP Extended Packet
>>
>>    where fields are defined as the following:
>>
>>    o  U - a one-bit flag, located as specified in Section 5.2.  A
>>       Session-Sender MUST set the U flag to 0 before transmitting an
>>       extended STAMP test packet.  A Session-Reflector MUST set the U
>>       flag to 1 if the Session-Reflector has not understood the TLV.
>>
>>    o  L - a one-bit flag, located as specified in Section 5.2.  A
>>       Session-Sender MUST set the L flag to 0 before transmitting an
>>       extended STAMP test packet.  A Session-Reflector MUST set the L
>>       flag to 1 if the Session-Reflector determined the TLV is
>>       malformed, i.e., the Length field value of the fixed-size TLV is
>>       not equal to the value defined for the particular type, or the
>>       remaining length of the extended STAMP packet is less than the
>>       size of the TLV.
>>
>>    o  R - reserved flags for future use.  These flags MUST be zeroed on
>>       transmit and ignored on receipt.
>>
>>    o  Type - one-octet long field that characterizes the interpretation
>>       of the Value field.  It is allocated by IANA, as specified in
>>       Section 5.1
>>
>>    o  Length - two-octets long field equals length on the Value field in
>>       octets.
>>
>>    o  Value - a variable-length field.  Its interpretation and encoding
>>       determined by the value of the Type field.
>>
>>    A STAMP node, whether Session-Sender or Session-Reflector, receiving
>>    a test packet MUST determine whether the packet is a base STAMP
>>    packet or includes one or more TLVs.  The node MUST compare the value
>>    in the Length field of the UDP header and the length of the base
>>    STAMP test packet in the mode, unauthenticated or authenticated based
>>    on the configuration of the particular STAMP test session.  If the
>>    difference between the two values is larger than the length of UDP
>>    header, then the test packet includes one or more STAMP TLVs that
>>    immediately follow the base STAMP test packet.
>>
>>    A system that has received a STAMP test packet with extension TLVs
>>    MUST validate each TLV:
>>
>>       if the U flag is set, the STAMP system MUST skip the processing of
>>       the TLV.  The implementation MUST try to process the next TLV if
>>       present in the extended STAMP packet.
>>
>>       if the L flag is set, the STAMP system MUST stop processing the
>>       remainder of the extended STAMP packet.
>>
>>       if an implementation of a Session-Reflector does not recognize the
>>       Type field value, it MUST include the copy of the TLV into the
>>       reflected STAMP packet.  The Session-Reflector MUST set the U flag
>>       to 1.  The Session-Reflector MUST try to process the next TLV in
>>       the extended STAMP packet;
>>
>>       if a TLV is malformed, the processing of extension TLVs MUST be
>>       stopped.  The Session-Reflector MUST copy the remainder of the
>>       received extended STAMP packet into the reflected STAMP packet.
>>       The Session-Reflector MUST set the L flag to 1.
>>
>>    Detected error events MUST be logged.  Note that rate of logging MUST
>>    be controlled.
>>
>> Please note, that IANA is also requested to create a STAMP TLV Flags
>> sub-registry.
>> We hope this is an acceptable solution. Always welcome your questions,
>> comments, and suggestions.
>>
>>
>>> --Charlie
>>>
>>

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<div dir=3D"ltr">Hi Charlie,<div>I hope this note finds you well.</div><div=
>How have you found the proposed updates to the draft? Do you think that yo=
ur comments have been addressed by the proposed changes? Please let me know=
 if you have any further questions. I greatly appreciate=C2=A0your feedback=
.</div><div>Attached please find the current working version and the diff w=
ith -06.</div><div><br></div><div>Regards,</div><div>Greg</div></div><br><d=
iv class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Jul =
2, 2020 at 12:30 PM Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com=
">gregimirsky@gmail.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_=
quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,=
204);padding-left:1ex"><div dir=3D"ltr">Hi Charlie,<div>you might be intere=
sted to know that another case of using ICMP in our document was pointed ou=
t in LC comments. That was used to report a failure of HMAC authentication =
verification. The authors discussed it and have agreed to use a new STAMP T=
LV Flag. You can find updates (also addressing GenART IETF LC comments by D=
an Romascanu) in the attached copies of the working version of the draft an=
d the diff to -06.</div><div>I greatly appreciate your consideration and fe=
edback.</div><div><br></div><div>Regards,</div><div>Greg</div></div><br><di=
v class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Jun 2=
9, 2020 at 1:19 PM Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com"=
 target=3D"_blank">gregimirsky@gmail.com</a>&gt; wrote:<br></div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px s=
olid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div dir=3D"ltr">H=
i Charlie,<div>thank you for your thorough review, detailed questions, and =
thoughtful=C2=A0suggestions. We&#39;ve discussed your comments and propose =
changes that are described below. Also, you can find the changes highlighte=
d in the attached diff between the -06 and the new working version of the d=
ocument. Please find my answers, notes in-line below under the GIM&gt;&gt; =
tag.</div><div><br></div><div>Regards,</div><div>Greg</div></div><br><div c=
lass=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, Jun 26, =
2020 at 10:34 PM Charlie Kaufman &lt;<a href=3D"mailto:charliekaufman@outlo=
ok.com" target=3D"_blank">charliekaufman@outlook.com</a>&gt; wrote:<br></di=
v><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;borde=
r-left:1px solid rgb(204,204,204);padding-left:1ex">




<div dir=3D"ltr">
<div style=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color=
:rgb(0,0,0)">
<span>I have reviewed this document as part of the security directorate&#39=
;s ongoing effort to review all IETF documents being processed by the IESG.=
=C2=A0 These comments were written primarily for the benefit of the securit=
y area directors.=C2=A0 Document editors and WG
 chairs should treat these comments just like any other last call comments.=
<br>
</span>
<div><br>
</div>
<div>This I-D specifies extensions to the STAMP protocol defined in RFC 876=
2. The STAMP protocol runs over UDP and is similar to an &quot;echo&quot; p=
rotocol intended to be used to test network speed and bandwidth. This I-D s=
pecifies a series of TLV encoded extensions
 that can be appended to the end of the UDP packets of the STAMP protocol (=
as well as defining the TLV mechanism itself).<br>
</div>
<div><br>
</div>
<div>I could not find anything objectionable from a security standpoint in =
this extension mechanism. It is a bit odd that when extensions are added to=
 an HMAC protected packet, instead of adding the extensions before the HMAC=
 and having the HMAC protect the
 entire contents, they keep the existing HMAC that protects the base packet=
 and add a second HMAC at the end of the extensions that protects only the =
extensions. This would potentially allow an attacker to &quot;mix and match=
&quot; the extensions from one packet with
 the base content of a different packet, but it&#39;s not clear what an att=
acker might be able to gain by doing that.<br></div></div></div></blockquot=
e><div>GIM&gt;&gt; I think that the STAMP YANG data model could be used to =
minimize the possible attack vector you&#39;ve described. We will certainly=
 keep that as one of the objectives when updating <a href=3D"https://datatr=
acker.ietf.org/doc/draft-ietf-ippm-stamp-yang/" target=3D"_blank">draft-iet=
f-ippm-stamp-yang</a>.=C2=A0Also, HMAC TLV might be required even in unauth=
enticated STAMP mode to protect the integrity on a certain TLV(s). Do you s=
ee this as a useful scenario or unnecessary feature?</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rg=
b(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div style=3D"font-family=
:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"><div>
</div>
<div><br>
</div>
<div>One of the pieces of information an extension can request is the 6 byt=
e MAC address of the incoming packet as seen by the peer (which will normal=
ly by the MAC address of the last router on the path). That information is =
not normally available to someone
 on a distant network, but it&#39;s not obvious what harm could come from t=
heir knowing it.<br></div></div></div></blockquote><div>GIM&gt;&gt; As ment=
ioned above, HMAC TLV may follow some STAMP TLVs. Do you think that the=C2=
=A0document should recommend using HMAC TLV with the Location TLV?</div><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-lef=
t:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div style=
=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0=
)"><div>
</div>
<div><br>
</div>
<div>The protocol can also request the source and destination IP addresses =
as seen by the peer (presumably to detect NAT gateways), but the protocol a=
ssumes the originator will know whether the peer will see IPv4 or IPv6 addr=
esses, so dealing with 6-to-4 gateways
 could be tricky.<br>
</div>
<div><br>
</div>
<div>On page 19 table 2, this document asks IANA to assign extension type c=
odes. In all other documents of this sort that I have seen, the document as=
signs the codes and asks IANA to track subsequent additions.<br></div></div=
></div></blockquote><div>GIM&gt;&gt; Martin Duke, the Responsible AD for IP=
PM WG, asked this question in his review. He has agreed to leave the text a=
s-is since no one asked for a particular number.</div><blockquote class=3D"=
gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(20=
4,204,204);padding-left:1ex"><div dir=3D"ltr"><div style=3D"font-family:Cal=
ibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"><div>
</div>
<div><br>
</div>
<div>On some kinds of errors, the protocol specifies that the error is repo=
rted via and ICMP message. For others, it specifies that a field be returne=
d containing all zeros. It&#39;s probably better to report errors &quot;in =
band&quot; because so many routers swallow ICMP
 messages. The spec does not - and should - specify what to do if the lengt=
h of the TLV coded extensions does not match the length of the UDP packet c=
ontaining them (or at least I couldn&#39;t find where it was specified).<br=
></div></div></div></blockquote><div>GIM&gt;&gt; Thank you for pointing out=
 this awkward handling. We had continued discussion with Martin Duke and Ra=
kesh Gandhi on improving the mechanism of reporting TLV errors. The discuss=
ion is in the updated Section 4 of the new working version and is copied be=
low:</div><div>4.=C2=A0 TLV Extensions to STAMP<br><br>=C2=A0 =C2=A0Type-Le=
ngth-Value (TLV) encoding scheme provides a flexible extension<br>=C2=A0 =
=C2=A0mechanism for optional informational elements.=C2=A0 TLV is an option=
al<br>=C2=A0 =C2=A0field in the STAMP test packet.=C2=A0 Multiple TLVs MAY =
be placed in the<br>=C2=A0 =C2=A0STAMP test packet.=C2=A0 A TLV MAY be encl=
osed in a TLV.=C2=A0 TLVs have the<br>=C2=A0 =C2=A0two octets long Type fie=
ld, two octets long Length field that is<br>=C2=A0 =C2=A0equal to the lengt=
h of the Value field in octets.=C2=A0 If a Type value<br>=C2=A0 =C2=A0for T=
LV or sub-TLV is in the range for Vendor Private Use, the Length<br>=C2=A0 =
=C2=A0MUST be at least 4, and the first four octets MUST be that vendor&#39=
;s<br>=C2=A0 =C2=A0the Structure of Management Information (SMI) Private En=
terprise<br>=C2=A0 =C2=A0Codes, as recorded in IANA&#39;s SMI Private Enter=
prise Codes sub-<br>=C2=A0 =C2=A0registry, in network octet order.=C2=A0 Th=
e rest of the Value field is<br>=C2=A0 =C2=A0private to the vendor.=C2=A0 T=
he following sections describe the use of<br>=C2=A0 =C2=A0TLVs for STAMP th=
at extends STAMP capability beyond its base<br>=C2=A0 =C2=A0specification.<=
br><br>=C2=A0 =C2=A0 =C2=A0 =C2=A00 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 1 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0=
 =C2=A0 =C2=A0 2 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 3<br>=C2=A0 =C2=A0 =C2=A0 =C2=A00 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 =
8 9 0 1 2 3 4 5 6 7 8 9 0 1<br>=C2=A0 =C2=A0 =C2=A0 +-+-+-+-+-+-+-+-+-+-+-+=
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+<br>=C2=A0 =C2=A0 =C2=A0 |U|L|R|R=
|R|R|R|R| =C2=A0 =C2=A0 Type =C2=A0 =C2=A0 =C2=A0| =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 Length =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0|<br>=C2=
=A0 =C2=A0 =C2=A0 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+=
-+-+-+-+<br>=C2=A0 =C2=A0 =C2=A0 ~ =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Value =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0~<br>=C2=A0 =C2=A0 =C2=A0 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+=
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+<br><br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 Figure 5: TLV Format in a STAMP Extended Packet<br><br>=
=C2=A0 =C2=A0where fields are defined as the following:<br><br>=C2=A0 =C2=
=A0o =C2=A0U - a one-bit flag, located as specified in Section 5.2. =C2=A0A=
<br>=C2=A0 =C2=A0 =C2=A0 Session-Sender MUST set the U flag to 0 before tra=
nsmitting an<br>=C2=A0 =C2=A0 =C2=A0 extended STAMP test packet.=C2=A0 A Se=
ssion-Reflector MUST set the U<br>=C2=A0 =C2=A0 =C2=A0 flag to 1 if the Ses=
sion-Reflector has not understood the TLV.<br><br>=C2=A0 =C2=A0o =C2=A0L - =
a one-bit flag, located as specified in Section 5.2. =C2=A0A<br>=C2=A0 =C2=
=A0 =C2=A0 Session-Sender MUST set the L flag to 0 before transmitting an<b=
r>=C2=A0 =C2=A0 =C2=A0 extended STAMP test packet.=C2=A0 A Session-Reflecto=
r MUST set the L<br>=C2=A0 =C2=A0 =C2=A0 flag to 1 if the Session-Reflector=
 determined the TLV is<br>=C2=A0 =C2=A0 =C2=A0 malformed, i.e., the Length =
field value of the fixed-size TLV is<br>=C2=A0 =C2=A0 =C2=A0 not equal to t=
he value defined for the particular type, or the<br>=C2=A0 =C2=A0 =C2=A0 re=
maining length of the extended STAMP packet is less than the<br>=C2=A0 =C2=
=A0 =C2=A0 size of the TLV.<br><br>=C2=A0 =C2=A0o =C2=A0R - reserved flags =
for future use.=C2=A0 These flags MUST be zeroed on<br>=C2=A0 =C2=A0 =C2=A0=
 transmit and ignored on receipt.<br><br>=C2=A0 =C2=A0o =C2=A0Type - one-oc=
tet long field that characterizes the interpretation<br>=C2=A0 =C2=A0 =C2=
=A0 of the Value field.=C2=A0 It is allocated by IANA, as specified in<br>=
=C2=A0 =C2=A0 =C2=A0 Section 5.1<br><br>=C2=A0 =C2=A0o =C2=A0Length - two-o=
ctets long field equals length on the Value field in<br>=C2=A0 =C2=A0 =C2=
=A0 octets.<br><br>=C2=A0 =C2=A0o =C2=A0Value - a variable-length field.=C2=
=A0 Its interpretation and encoding<br>=C2=A0 =C2=A0 =C2=A0 determined by t=
he value of the Type field.<br><br>=C2=A0 =C2=A0A STAMP node, whether Sessi=
on-Sender or Session-Reflector, receiving<br>=C2=A0 =C2=A0a test packet MUS=
T determine whether the packet is a base STAMP<br>=C2=A0 =C2=A0packet or in=
cludes one or more TLVs.=C2=A0 The node MUST compare the value<br>=C2=A0 =
=C2=A0in the Length field of the UDP header and the length of the base<br>=
=C2=A0 =C2=A0STAMP test packet in the mode, unauthenticated or authenticate=
d based<br>=C2=A0 =C2=A0on the configuration of the particular STAMP test s=
ession.=C2=A0 If the<br>=C2=A0 =C2=A0difference between the two values is l=
arger than the length of UDP<br>=C2=A0 =C2=A0header, then the test packet i=
ncludes one or more STAMP TLVs that<br>=C2=A0 =C2=A0immediately follow the =
base STAMP test packet.</div><div><br>=C2=A0 =C2=A0A system that has receiv=
ed a STAMP test packet with extension TLVs<br>=C2=A0 =C2=A0MUST validate ea=
ch TLV:<br><br>=C2=A0 =C2=A0 =C2=A0 if the U flag is set, the STAMP system =
MUST skip the processing of<br>=C2=A0 =C2=A0 =C2=A0 the TLV.=C2=A0 The impl=
ementation MUST try to process the next TLV if<br>=C2=A0 =C2=A0 =C2=A0 pres=
ent in the extended STAMP packet.<br><br>=C2=A0 =C2=A0 =C2=A0 if the L flag=
 is set, the STAMP system MUST stop processing the<br>=C2=A0 =C2=A0 =C2=A0 =
remainder of the extended STAMP packet.<br><br>=C2=A0 =C2=A0 =C2=A0 if an i=
mplementation of a Session-Reflector does not recognize the<br>=C2=A0 =C2=
=A0 =C2=A0 Type field value, it MUST include the copy of the TLV into the<b=
r>=C2=A0 =C2=A0 =C2=A0 reflected STAMP packet.=C2=A0 The Session-Reflector =
MUST set the U flag<br>=C2=A0 =C2=A0 =C2=A0 to 1.=C2=A0 The Session-Reflect=
or MUST try to process the next TLV in<br>=C2=A0 =C2=A0 =C2=A0 the extended=
 STAMP packet;<br><br>=C2=A0 =C2=A0 =C2=A0 if a TLV is malformed, the proce=
ssing of extension TLVs MUST be<br>=C2=A0 =C2=A0 =C2=A0 stopped.=C2=A0 The =
Session-Reflector MUST copy the remainder of the<br>=C2=A0 =C2=A0 =C2=A0 re=
ceived extended STAMP packet into the reflected STAMP packet.<br>=C2=A0 =C2=
=A0 =C2=A0 The Session-Reflector MUST set the L flag to 1.<br><br>=C2=A0 =
=C2=A0Detected error events MUST be logged.=C2=A0 Note that rate of logging=
 MUST<br>=C2=A0 =C2=A0be controlled.<br></div><div><br></div><div> Please n=
ote, that IANA is also requested to create a STAMP TLV Flags sub-registry.<=
/div><div>We hope this is an acceptable solution. Always welcome your quest=
ions, comments, and suggestions.=C2=A0<br></div><div><br></div><blockquote =
class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px sol=
id rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div style=3D"font-f=
amily:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)"><div>
</div>
<div><br>
</div>
<span>--Charlie</span><br>
</div>
</div>

</blockquote></div></div>
</blockquote></div>
</blockquote></div>

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From: Roman Danyliw <rdd@cert.org>
To: Christian Huitema <huitema@huitema.net>, Qin Wu <bill.wu@huawei.com>, Susan Hares <shares@ndzh.com>, "secdir@ietf.org" <secdir@ietf.org>
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Thread-Topic: [secdir] [Last-Call] [i2rs] Secdir last call review of draft-ietf-i2rs-yang-l2-network-topology-13
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--_000_026082ff28374dfd924508baffc1f6c3certorg_--


From nobody Mon Jul  6 13:33:33 2020
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Date: Mon, 6 Jul 2020 13:33:12 -0700
From: Benjamin Kaduk <kaduk@mit.edu>
To: Liang Xia <frank.xialiang@huawei.com>
Cc: secdir@ietf.org, last-call@ietf.org, tcpm@ietf.org, draft-ietf-tcpm-rto-consider.all@ietf.org
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Subject: Re: [secdir] Secdir last call review of draft-ietf-tcpm-rto-consider-14
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Hi Frank,

Thanks for the review.  I agree that what's presented in the document is
pretty straightforward and without direct security issues, however, I chose
to try to broaden the scope of the document slightly, balloting Discuss to
suggest adding a requirement that (when writing new protocols) the ACKs
used as input for RTO algorithms be unspoofable from off-path (i.e., have
enough entropy to be unguessable).  That kind of scope expansion is
probably outside the scope (pun intended) of a typical secdir review,
though :)

Thanks,

Ben

On Mon, May 25, 2020 at 05:54:56PM -0700, Liang Xia via Datatracker wrote:
> Reviewer: Liang Xia
> Review result: Ready
> 
> This document is good written, and no new security issues as it's a network
> mechanism requirements BCP document.
> 
> 
> _______________________________________________
> secdir mailing list
> secdir@ietf.org
> https://www.ietf.org/mailman/listinfo/secdir
> wiki: http://tools.ietf.org/area/sec/trac/wiki/SecDirReview


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Date: Mon, 6 Jul 2020 18:36:50 -0700
From: Benjamin Kaduk <kaduk@mit.edu>
To: Christian Huitema <huitema@huitema.net>, Qin Wu <bill.wu@huawei.com>, Susan Hares <shares@ndzh.com>
Cc: "secdir@ietf.org" <secdir@ietf.org>, "draft-ietf-i2rs-yang-l2-network-topology.all@ietf.org" <draft-ietf-i2rs-yang-l2-network-topology.all@ietf.org>
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Subject: Re: [secdir] [Last-Call] [i2rs] Secdir last call review of draft-ietf-i2rs-yang-l2-network-topology-13
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Seconded!
I had to stretch pretty hard to try to come up with any new security
considerations to talk about :)

-Ben

On Mon, Jul 06, 2020 at 07:52:07PM +0000, Roman Danyliw wrote:
> Hi Christian, thank you for your detailed review and text.
> 
> Hi Qin and Susan, thank you for your iterative refinement in response to the SECDIR review.
> 
> I’ve entered a no objection ballot.
> 
> Regards,
> Roman
> 
> From: secdir <secdir-bounces@ietf.org> On Behalf Of Christian Huitema
> Sent: Saturday, June 27, 2020 12:18 PM
> To: Qin Wu <bill.wu@huawei.com>; Susan Hares <shares@ndzh.com>; secdir@ietf.org
> Cc: i2rs@ietf.org; draft-ietf-i2rs-yang-l2-network-topology.all@ietf.org; NETMOD Group <netmod@ietf.org>; last-call@ietf.org
> Subject: Re: [secdir] [Last-Call] [i2rs] Secdir last call review of draft-ietf-i2rs-yang-l2-network-topology-13
> 
> Works for me. Thank you.
> 
> -- Christian Huitema
> 
> On 6/26/2020 11:26 PM, Qin Wu wrote:
> 
> Thanks Christian for clarification, here is the tweaked text to address your comment, which is positioned right after the discussion about writable/creatable/deletable attributes.
> 
> NEW TEXT:
> “
> 
> 6.  Security Considerations
> 
> 
> 
>    The YANG module specified in this document defines a schema for data
> 
>    that is designed to be accessed via network management protocols such
> 
>    as NETCONF [RFC6241] or RESTCONF [RFC8040].  The lowest NETCONF layer
> 
>    is the secure transport layer, and the mandatory-to-implement secure
> 
>    transport is Secure Shell (SSH) [RFC6242].  The lowest RESTCONF layer
> 
>    is HTTPS, and the mandatory-to-implement secure transport is TLS
> 
>    [RFC8446].
> 
> 
> 
>    The Network Configuration Access Control Model (NACM) [RFC8341]
> 
>    provides the means to restrict access for particular NETCONF or
> 
> 
> 
>    RESTCONF users to a preconfigured subset of all available NETCONF or
> 
>    RESTCONF protocol operations and content.
> 
> 
> 
>    The Layer 2 topology module define information that can be
> 
>    configurable in certain instances, for example in the case of virtual
> 
>    topologies that can be created by client applications.  In such
> 
>    cases, a malicious client could introduce topologies that are
> 
>    undesired.  Specifically, a malicious client could attempt to remove
> 
>    or add a node, a link, a termination point, by creating or deleting
> 
>    corresponding elements in the node, link, and termination point
> 
>    lists, respectively.  In the case of a topology that is learned, the
> 
>    server will automatically prohibit such misconfiguration attempts.
> 
>    In the case of a topology that is configured, i.e. whose origin is
> 
>    "intended", the undesired configuration could become effective and be
> 
>    reflected in the operational state datastore, leading to disruption
> 
>    of services provided via this topology might be disrupted.  For those
> 
>    reasons, it is important that the NETCONF access control model is
> 
>    vigorously applied to prevent topology misconfiguration by
> 
>    unauthorized clients.
> 
> 
> 
>    There are a number of data nodes defined in this YANG module that are
> 
>    writable/creatable/deletable (i.e., config true, which is the
> 
>    default).  These data nodes may be considered sensitive or vulnerable
> 
>    in some network environments.  Write operations (e.g., edit-config)
> 
>    to these data nodes without proper protection can have a negative
> 
>    effect on network operations.  These are the subtrees and data nodes
> 
>    and their sensitivity/vulnerability in the ietf-network module:
> 
> 
> 
>    o  l2-network-attributes: A malicious client could attempt to
> 
>       sabotage the configuration of any of the contained attributes,
> 
>       such as the name or the flag data nodes.
> 
> 
> 
>    o  l2-node-attributes: A malicious client could attempt to sabotage
> 
>       the configuration of important node attributes, such as the name
> 
>       or the management-address.
> 
> 
> 
>    o  l2-link-attributes: A malicious client could attempt to sabotage
> 
>       the configuration of important link attributes, such as the rate
> 
>       or the delay data nodes.
> 
> 
> 
>    o  l2-termination-point-attributes: A malicious client could attempt
> 
>       to sabotage the configuration of important termination point
> 
>       attributes, such as the maximum-frame-size.
> 
> 
> Some of the readable data nodes in this YANG module may be considered
> sensitive or vulnerable in some network environments. It is thus  important to control
> read access (e.g., via get, get-config, or notification) to these data nodes. In particular, the
> YANG model for layer 2 topology may expose sensitive information, for example the MAC
> addresses of devices. Unrestricted use of such information can lead to privacy violations.
> For example, listing MAC addresses in a network allows monitoring of devices and their
> movements. Location information can be derived from MAC addresses of network devices,
> bypassing protection of location information by the Operating System.
> 
> 
> ”
> 
> Thanks.
> 
> 
> 
> -Qin
> 发件人: Christian Huitema [mailto:huitema@huitema.net]
> 发送时间: 2020年6月26日 22:55
> 收件人: Qin Wu <bill.wu@huawei.com><mailto:bill.wu@huawei.com>; Susan Hares <shares@ndzh.com><mailto:shares@ndzh.com>; secdir@ietf.org<mailto:secdir@ietf.org>
> 抄送: i2rs@ietf.org<mailto:i2rs@ietf.org>; draft-ietf-i2rs-yang-l2-network-topology.all@ietf.org<mailto:draft-ietf-i2rs-yang-l2-network-topology.all@ietf.org>; last-call@ietf.org<mailto:last-call@ietf.org>; NETMOD Group <netmod@ietf.org><mailto:netmod@ietf.org>
> 主题: Re: [Last-Call] [i2rs] Secdir last call review of draft-ietf-i2rs-yang-l2-network-topology-13
> 
> 
> I like variant B better, although I would not single out the mac addresses in the "sabotage" warning.
> 
> My main concern is that network administrators will naturally be very concerned about information that is writable/creatable/deletable, because they understand the impact on the management of their network. However, they are not so concerned with read-only access, because reading information does not directly affect the operation of the network. My whole point is telling them, "you are documenting your L2 topology, it contains sensitive information, make sure that reading it is protected, not just writing it".
> 
> I agree that NETCONF and RESTCONF provide the right tools for protecting the information. My request is just to clearly tell network administrators to use these tools, do not leave read access wide open!
> 
> -- Christian Huitema
> On 6/26/2020 4:37 AM, Qin Wu wrote:
> 
> Hi, Christian:
> 
>   1.  NACM defined in RFC8341 has already provided mechanisms to restrict access to sensitive information to a minimal list of authorized client or agents and deal with privacy issue if my understanding is correct.
>   2.  Both NETCONF and RESTCONF will rely on transport protocol such as TLS to provide client authentication and server authentication, i.e., mutual authentication.
>   3.  The YANG security guideline defined in https://trac.ietf.org/trac/ops/wiki/yang-security-guidelines
> 
> Provide perfect boilerplate to address both security consideration and privacy consideration.
> 
> My original proposal A to address your comments is:
> 
> OLD TEXT:
> 
> "
> 
>    There are a number of data nodes defined in this YANG module that are
> 
>    writable/creatable/deletable (i.e., config true, which is the
> 
>    default).  These data nodes may be considered sensitive or vulnerable
> 
>    in some network environments.  Write operations (e.g., edit-config)
> 
>    to these data nodes without proper protection can have a negative
> 
>    effect on network operations.  These are the subtrees and data nodes
> 
>    and their sensitivity/vulnerability in the ietf-network module:
> 
> 
> 
>    o  l2-network-attributes: A malicious client could attempt to
> 
>       sabotage the configuration of any of the contained attributes,
> 
>       such as the name or the flag data nodes.
> 
> 
> 
>    o  l2-node-attributes: A malicious client could attempt to sabotage
> 
>       the configuration of important node attributes, such as the name
> 
>       or the management-address.
> 
> 
> 
>    o  l2-link-attributes: A malicious client could attempt to sabotage
> 
>       the configuration of important link attributes, such as the rate
> 
>       or the delay data nodes.
> 
> 
> 
>    o  l2-termination-point-attributes: A malicious client could attempt
> 
>       to sabotage the configuration of important termination point
> 
>       attributes, such as the maximum-frame-size.
> 
> "
> 
> NEW TEXT:
> 
> "
> 
>    There are a number of data nodes defined in this YANG module that are
> 
>    writable/creatable/deletable (i.e., config true, which is the
> 
>    default).  These data nodes may be considered sensitive or vulnerable
> 
>    in some network environments.  Write operations (e.g., edit-config)
> 
>    to these data nodes without proper protection can have a negative
> 
>    effect on network operations.  These are the subtrees and data nodes
> 
>    and their sensitivity/vulnerability in the ietf-network module:
> 
> 
> 
>    o  l2-network-attributes: A malicious client could attempt to
> 
>       sabotage the configuration of any of the contained attributes,
> 
>       such as the name or the flag data nodes.
> 
> 
> 
>    o  l2-node-attributes: A malicious client could attempt to sabotage
> 
>       the configuration of important node attributes, such as the name
> 
>       ,the management-address or mac address of the devices.
> 
> 
> 
>    o  l2-link-attributes: A malicious client could attempt to sabotage
> 
>       the configuration of important link attributes, such as the rate
> 
>       or the delay data nodes.
> 
> 
> 
>   o  l2-termination-point-attributes: A malicious client could attempt
> 
>       to sabotage the configuration of important termination point
> 
>       attributes, such as the maximum-frame-size, mac-address.
> 
> "
> 
> 
> 
> With your proposed text, we could have the following proposal changes (Proposal B):
> 
> OLD TEXT:
> 
> "
> 
> 6.  Security Considerations
> 
> 
> 
>    The YANG module specified in this document defines a schema for data
> 
>    that is designed to be accessed via network management protocols such
> 
>    as NETCONF [RFC6241] or RESTCONF [RFC8040].  The lowest NETCONF layer
> 
>    is the secure transport layer, and the mandatory-to-implement secure
> 
>    transport is Secure Shell (SSH) [RFC6242].  The lowest RESTCONF layer
> 
>    is HTTPS, and the mandatory-to-implement secure transport is TLS
> 
>    [RFC8446].
> 
> 
> 
>    The Network Configuration Access Control Model (NACM) [RFC8341]
> 
>    provides the means to restrict access for particular NETCONF or
> 
> 
> 
>    RESTCONF users to a preconfigured subset of all available NETCONF or
> 
>    RESTCONF protocol operations and content.
> 
> 
> 
>    In general, Layer 2 network topologies are system-controlled and
> 
>    provide ephemeral topology information.  In an NMDA-complient server,
> 
>    they are only part of <operational> which provides read-only access
> 
>    to clients, they are less vulnerable.  That said, the YANG module
> 
>    does in principle allow information to be configurable.
> 
> 
> 
>    The Layer 2 topology module define information that can be
> 
>    configurable in certain instances, for example in the case of virtual
> 
>    topologies that can be created by client applications.  In such
> 
>    cases, a malicious client could introduce topologies that are
> 
>    undesired.  Specifically, a malicious client could attempt to remove
> 
>    or add a node, a link, a termination point, by creating or deleting
> 
>    corresponding elements in the node, link, and termination point
> 
>    lists, respectively.  In the case of a topology that is learned, the
> 
>    server will automatically prohibit such misconfiguration attempts.
> 
>    In the case of a topology that is configured, i.e. whose origin is
> 
>    "intended", the undesired configuration could become effective and be
> 
>    reflected in the operational state datastore, leading to disruption
> 
>    of services provided via this topology might be disrupted.  For those
> 
>    reasons, it is important that the NETCONF access control model is
> 
>    vigorously applied to prevent topology misconfiguration by
> 
>    unauthorized clients.
> 
> 
> 
>    There are a number of data nodes defined in this YANG module that are
> 
>    writable/creatable/deletable (i.e., config true, which is the
> 
>    default).  These data nodes may be considered sensitive or vulnerable
> 
>    in some network environments.  Write operations (e.g., edit-config)
> 
>    to these data nodes without proper protection can have a negative
> 
>    effect on network operations.  These are the subtrees and data nodes
> 
>    and their sensitivity/vulnerability in the ietf-network module:
> 
> 
> 
>    o  l2-network-attributes: A malicious client could attempt to
> 
>       sabotage the configuration of any of the contained attributes,
> 
>       such as the name or the flag data nodes.
> 
> 
> 
>    o  l2-node-attributes: A malicious client could attempt to sabotage
> 
>       the configuration of important node attributes, such as the name
> 
>       or the management-address.
> 
> 
> 
>    o  l2-link-attributes: A malicious client could attempt to sabotage
> 
>       the configuration of important link attributes, such as the rate
> 
>       or the delay data nodes.
> 
> 
> 
>    o  l2-termination-point-attributes: A malicious client could attempt
> 
>       to sabotage the configuration of important termination point
> 
>       attributes, such as the maximum-frame-size.
> 
> "
> 
> NEW TEXT:
> 
> "
> 
> 6.  Security Considerations
> 
> 
> 
>    The YANG module specified in this document defines a schema for data
> 
>    that is designed to be accessed via network management protocols such
> 
>    as NETCONF [RFC6241] or RESTCONF [RFC8040].  The lowest NETCONF layer
> 
>    is the secure transport layer, and the mandatory-to-implement secure
> 
>    transport is Secure Shell (SSH) [RFC6242].  The lowest RESTCONF layer
> 
>    is HTTPS, and the mandatory-to-implement secure transport is TLS
> 
>    [RFC8446].
> 
> 
> 
>    The Network Configuration Access Control Model (NACM) [RFC8341]
> 
>    provides the means to restrict access for particular NETCONF or
> 
>    RESTCONF users to a preconfigured subset of all available NETCONF or
> 
>    RESTCONF protocol operations and content.
> 
> 
> 
>    In general, Layer 2 network topologies are system-controlled and
> 
>    provide ephemeral topology information.  In an NMDA-complient server,
> 
>    they are only part of <operational> which provides read-only access
> 
>    to clients, they are less vulnerable.  That said, the YANG module
> 
>    does in principle allow information to be configurable.
> 
> 
> 
>    The Layer 2 topology module define information that can be
> 
>    configurable in certain instances, for example in the case of virtual
> 
>    topologies that can be created by client applications.  In such
> 
>    cases, a malicious client could introduce topologies that are
> 
>    undesired.  Specifically, a malicious client could attempt to remove
> 
>    or add a node, a link, a termination point, by creating or deleting
> 
>    corresponding elements in the node, link, and termination point
> 
>    lists, respectively.  In the case of a topology that is learned, the
> 
>    server will automatically prohibit such misconfiguration attempts.
> 
>    In the case of a topology that is configured, i.e. whose origin is
> 
>    "intended", the undesired configuration could become effective and be
> 
>    reflected in the operational state datastore, leading to disruption
> 
>    of services provided via this topology might be disrupted.  For those
> 
>    reasons, it is important that the NETCONF access control model is
> 
>    vigorously applied to prevent topology misconfiguration by
> 
>    unauthorized clients.
> 
> 
> 
>   The YANG model for layer 2 topology may expose sensitive information,
> 
>   for example the MAC addresses of devices. Unrestricted use of such information
> 
>    can lead to privacy violations. For example, listing MAC addresses in a network
> 
>    allows monitoring of devices and their movements. Location information can be derived
> 
>    from MAC addresses of network devices, bypassing protection of location information by
> 
>    the Operating System. Deployments should mitigate this privacy concerns by limiting access
> 
>    to the layer 2 topology information. Access to the information should be restricted to a
> 
>    minimal list of authorized clients, and should also require proper authentication of these clients.
> 
> 
> 
>    There are a number of data nodes defined in this YANG module that are
> 
>    writable/creatable/deletable (i.e., config true, which is the
> 
>    default).  These data nodes may be considered sensitive or vulnerable
> 
>    in some network environments.  Write operations (e.g., edit-config)
> 
>    to these data nodes without proper protection can have a negative
> 
>    effect on network operations.  These are the subtrees and data nodes
> 
>    and their sensitivity/vulnerability in the ietf-network module:
> 
> 
> 
>    o  l2-network-attributes: A malicious client could attempt to
> 
>       sabotage the configuration of any of the contained attributes,
> 
>       such as the name or the flag data nodes.
> 
> 
> 
>    o  l2-node-attributes: A malicious client could attempt to sabotage
> 
>       the configuration of important node attributes, such as the name
> 
>       ,the management-address, mac-address of the devices.
> 
> 
> 
>    o  l2-link-attributes: A malicious client could attempt to sabotage
> 
>       the configuration of important link attributes, such as the rate
> 
>       or the delay data nodes.
> 
> 
> 
>    o  l2-termination-point-attributes: A malicious client could attempt
> 
>       to sabotage the configuration of important termination point
> 
>       attributes, such as the maximum-frame-size, mac-address.
> 
> "
> 
> The question is do you think proposal with yang security boilterplate has already addressed your comments
> 
> Or you think we should emphasize how privacy issue can be addressed by NACM and client authentication is needed?
> 
> 
> 
> -Qin
> 
> -----邮件原件-----
> 发件人: Christian Huitema [mailto:huitema@huitema.net]
> 发送时间: 2020年6月26日 12:05
> 收件人: Susan Hares <shares@ndzh.com><mailto:shares@ndzh.com>; Qin Wu <bill.wu@huawei.com><mailto:bill.wu@huawei.com>; secdir@ietf.org<mailto:secdir@ietf.org>
> 抄送: i2rs@ietf.org<mailto:i2rs@ietf.org>; draft-ietf-i2rs-yang-l2-network-topology.all@ietf.org<mailto:draft-ietf-i2rs-yang-l2-network-topology.all@ietf.org>; last-call@ietf.org<mailto:last-call@ietf.org>
> 主题: Re: [Last-Call] [i2rs] Secdir last call review of draft-ietf-i2rs-yang-l2-network-topology-13
> 
> 
> 
> How about adding something like this:
> 
> 
> 
> Privacy Considerations
> 
> 
> 
> The Yang model for layer 2 topology exposes privacy sensitive information, for example the MAC addresses of devices. Unrestricted use of such information can lead to privacy violations. For example, listing MAC addresses in a network allows monitoring of devices and their movements. Location information can be derived from MAC addresses of network devices, bypassing protection of location information by the Operating System.
> 
> 
> 
> Deployments should mitigate this privacy concerns by limiting access to the layer 2 topology information. Access to the information should be restricted to a minimal list of authorized agents, and should require proper authentication of these agents.
> 
> 
> 
> -- Christian Huitema
> 
> 
> 
> On 6/25/2020 7:00 AM, Susan Hares wrote:
> 
> > Qin and Christian:
> 
> >
> 
> > Thank you for your prompt attention to the privacy issue.
> 
> > I'm sure Christian will respond in a bit - since he might be in PDT time-zone.
> 
> >
> 
> > Once you have a solution you both like, we should validate the privacy
> 
> > changes to the security considerations section with the Yang-doctors,
> 
> > OPS-ADs, and Security-ADs.
> 
> >
> 
> > Martin's watching this thread so I'm sure he'll help us out as well.
> 
> >
> 
> > Sue
> 
> >
> 
> > -----Original Message-----
> 
> > From: i2rs [mailto:i2rs-bounces@ietf.org] On Behalf Of Qin Wu
> 
> > Sent: Thursday, June 25, 2020 9:25 AM
> 
> > To: Susan Hares; 'Christian Huitema'; secdir@ietf.org<mailto:secdir@ietf.org>
> 
> > Cc: i2rs@ietf.org<mailto:i2rs@ietf.org>;
> 
> > draft-ietf-i2rs-yang-l2-network-topology.all@ietf.org<mailto:draft-ietf-i2rs-yang-l2-network-topology.all@ietf.org>;
> 
> > last-call@ietf.org<mailto:last-call@ietf.org>
> 
> > Subject: Re: [i2rs] Secdir last call review of
> 
> > draft-ietf-i2rs-yang-l2-network-topology-13
> 
> >
> 
> > Sue and Christian:
> 
> > I have responded to Christian on privacy issue, my proposal is to add MAC address as another data node vulnerability example in our original security consideration section.
> 
> > But If Christian or security directorate has recommending text, we authors are happy to accept it.
> 
> >
> 
> > -Qin
> 
> > -----邮件原件-----
> 
> > 发件人: Susan Hares [mailto:shares@ndzh.com]
> 
> > 发送时间: 2020年6月25日 21:04
> 
> > 收件人: 'Christian Huitema' <huitema@huitema.net<mailto:huitema@huitema.net>>; secdir@ietf.org<mailto:secdir@ietf.org>
> 
> > 抄送: draft-ietf-i2rs-yang-l2-network-topology.all@ietf.org<mailto:draft-ietf-i2rs-yang-l2-network-topology.all@ietf.org>;
> 
> > i2rs@ietf.org<mailto:i2rs@ietf.org>; last-call@ietf.org<mailto:last-call@ietf.org>
> 
> > 主题: RE: Secdir last call review of
> 
> > draft-ietf-i2rs-yang-l2-network-topology-13
> 
> >
> 
> > Christian:
> 
> >
> 
> > Thank you for catching the privacy issues.
> 
> >
> 
> > I've got a few questions to help the authors scope this change:
> 
> >
> 
> > 1) Since this is common to all L2 Topologies, can you or the security directorate recommend some text that might be appropriate?
> 
> >    If you have recommended text, has this text been reviewed by OPS-DIR and Yang doctors?
> 
> >
> 
> > 2) Will it be a problem If we write privacy considerations on IEEE specifications?
> 
> > 3) Do we need to consider the range of deployments of L2 (home,
> 
> > enterprise,  public PBB service, national PBB service, Data centers)
> 
> >
> 
> >
> 
> > Thank you,  Sue
> 
> >
> 
> >
> 
> > -----Original Message-----
> 
> > From: Christian Huitema via Datatracker [mailto:noreply@ietf.org]
> 
> > Sent: Thursday, June 25, 2020 1:01 AM
> 
> > To: secdir@ietf.org<mailto:secdir@ietf.org>
> 
> > Cc: draft-ietf-i2rs-yang-l2-network-topology.all@ietf.org<mailto:draft-ietf-i2rs-yang-l2-network-topology.all@ietf.org>;
> 
> > i2rs@ietf.org<mailto:i2rs@ietf.org>; last-call@ietf.org<mailto:last-call@ietf.org>
> 
> > Subject: Secdir last call review of
> 
> > draft-ietf-i2rs-yang-l2-network-topology-13
> 
> >
> 
> > Reviewer: Christian Huitema
> 
> > Review result: Has Issues
> 
> >
> 
> > I have reviewed this document as part of the security directorate's ongoing effort to review all IETF documents being processed by the IESG.  These comments were written with the intent of improving security requirements and considerations in IETF drafts.  Comments not addressed in last call may be included in AD reviews during the IESG review.  Document editors and WG chairs should treat these comments just like any other last call comments.
> 
> >
> 
> > This document describes a Yang model for representing Link Layer topologies.
> 
> > Representing such topologies is obviously useful for managing network.
> 
> > The security section is focused on securing the usage of this information for network management, but does not address potential privacy issues.
> 
> >
> 
> > The security considerations explain correctly how altering the link layer information could enable attacks against the network. The proposed remedy is access control, implemented using either SSH or TLS. This is fine, although the discussion of TLS authorisation is a bit short. By default, TLS verifies the identity of the server but not that of the client. RFC8040 section 2.5 specifies that "a RESTCONF server SHOULD require authentication based on TLS client certificates. I assume that's the intent, but it might be useful to say so.
> 
> >
> 
> > On the other hand, the security considerations do not describe privacy issues, and I find that problematic. The proposed information model lists a number of sensitive data, such as for example the MAC addresses of devices.
> 
> > This information can be misused. For example, applications could assess device location fetching the MAC addresses of local gateways. Third parties could access link local information to gather identities of devices accessing a particular network. Such information is often protected by privacy API in the Operating System, but accessing the Yang module over the network might allow applications to bypass these controls.
> 
> >
> 
> > Client authentication alone does not necessarily protect against these privacy leaks. A classic configuration error would limit write access to authorized users, but to allow read-only access to most users. This kind of error would allow privacy leaks. Given the sensitive nature of MAC addresses and other identifiers, it is useful to warn against such errors.
> 
> >
> 
> >
> 
> >
> 
> >
> 
> >
> 
> > _______________________________________________
> 
> > i2rs mailing list
> 
> > i2rs@ietf.org<mailto:i2rs@ietf.org>
> 
> > https://www.ietf.org/mailman/listinfo/i2rs
> 
> >
> 
> 

> _______________________________________________
> secdir mailing list
> secdir@ietf.org
> https://www.ietf.org/mailman/listinfo/secdir
> wiki: http://tools.ietf.org/area/sec/trac/wiki/SecDirReview


From nobody Mon Jul  6 19:53:18 2020
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Subject: [secdir] Secdir last call review of draft-ietf-cose-hash-algs-06
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Reviewer: Brian Weis
Review result: Ready

This is a very tardy security considerations review; many apologies to the ADs
and the author. After reviewing draft-ietf-cose-hash-algs-06 I have only two
minor wording suggestions, which Jim can choose to implement or not.

(1) Referencing BCP 201 in the second paragraph of Section 2 was a good
addition to this sentence:
   Applications should also make sure that the ability to change
   hash functions is part of the base design, as cryptographic advances
   are sure to reduce the strength of a hash function [BCP201].

But reading the BCP does point out that perhaps the current wording is not
precise.  I have always considered “cryptographic advances” as the
strengthening of algorithms or development of new stronger algorithms rather
than increased success of attacks on algorithms. The BCP uses the wording
"advances in computing power or advances in cryptoanalytic techniques” to
describe this phenomenon. Maybe “cryptographic advances” could be replaced with
that phrase from the BCP, or at least change “cryptographic” to “cryptanalytic”.

(2) Security Considerations describes two properties of a hash function. By the
time the reader gets to this section they should well understand what is
collision resistance. But  then second pre-image resistance is mentioned
offhand without any explanation. Adding a parenthetical definition for second
pre-image resistance would be helpful to the reader. For example, by adding
“(i.e., where it is computationally infeasible to find any second input which
has the same output as that of a specified input)” to the end of the sentence.
(This text was lifted from the Wikipedia “Preimage attack” article.)



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Subject: Re: [secdir] secdir review of draft-ietf-pce-pcep-flowspec-09
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Thanks for taking the time, Scott.

Best
Adrian

-----Original Message-----
From: Scott G. Kelly <scott@hyperthought.com>=20
Sent: 05 July 2020 23:48
To: secdir@ietf.org; iesg@ietf.org; =
draft-ietf-pce-pcep-flowspec.all@ietf.org
Subject: secdir review of draft-ietf-pce-pcep-flowspec-09

I have reviewed this document as part of the security directorate's =
ongoing effort to review all IETF documents being processed by the IESG. =
 These comments were written primarily for the benefit of the security =
area directors.  Document editors and WG chairs should treat these =
comments just like any other last call comments.

The summary of the review is ready.=20

>From the abstract, "This document specifies a set of extensions to PCEP =
to support dissemination of Flow Specifications.  This allows a PCE to =
indicate what traffic should be placed on each path that it is aware =
of."

The security considerations section says that this mechanism has all of =
the same security considerations of the underlying PCEP protocol, and =
that all of the same security considerations in RFC5440, RFC6952, and =
RFC8253 apply. It also mentions some additional privacy considerations, =
and that order of installation for overlapping flow specs may have =
unexpected consequences that could be exploited by an attacker.

I don't have additional concerns.




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Reviewer: Christian Huitema
Review result: Ready

I have reviewed the changes made in draft 14. The new version of the security
section recognizes and addresses the privacy issue flagged in my review of
draft 13.



From nobody Wed Jul  8 04:18:24 2020
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From: Stewart Bryant <stewart.bryant@gmail.com>
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Date: Wed, 8 Jul 2020 12:18:02 +0100
Cc: Stewart Bryant <stewart.bryant@gmail.com>, secdir <secdir@ietf.org>, mpls <mpls@ietf.org>, draft-ietf-mpls-sfl-framework.all@ietf.org, last-call@ietf.org
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Subject: Re: [secdir] [mpls] Secdir last call review of draft-ietf-mpls-sfl-framework-08
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> On 2 Jul 2020, at 23:30, Tero Kivinen via Datatracker =
<noreply@ietf.org> wrote:
>=20
>=20
>=20
> It does claim in the security considerations section that there is no =
new
> security issues associated with the MPLS dataplane. I think that is =
not true.
> If there is any kind of different processing depending which synonym
> is used that can be used to bypass that processing by using the =
another
> synonym instead of the intended one.



> For example if attacker knows=20
> that specific synonym causes deep packet inspection (one of the =
examples
> given), and he might want to use the synonym which bypasses this=20
s/he/they/
> inspection, in case he is sending things he does not want to be=20
> inspected. This could be some kind of malicious code somehow
> loaded to the sending device or something.

The sending device is always an LSR owned by the provider, there is no =
way for a random device to do this. Equally the P routers are owned and =
managed by the provider.

>=20
> On the other hand my understanding that trust model of MPLS
> is mostly we blindly trust everything other end says, so someone
> able to use different synonyms are most likely also able to do=20
> other even worse things, but I think there are new things caused
> by this addition than what is already present in the MPLS now.

If you can articulations them, we will look at the level of threat and =
how we might mitigate them. However we are not aware of any such new =
threats. As you say, if you compromised the ingress PE in a MPLS network =
you are pretty much dead in the water anyway. These environments are =
well managed and tend to be secure.

Thus, I do not propose to add any text unless there is a well =
articulated and specific threat that is not already considered within =
the existing MPLS design.

Many thanks for the review.

Stewart





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To: Donald Eastlake <d3e3e3@gmail.com>, "iesg@ietf.org" <iesg@ietf.org>, secdir <secdir@ietf.org>, draft-ietf-hip-dex.all@ietf.org, secdir-secretary@mit.org
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From: Robert Moskowitz <rgm@labs.htt-consult.com>
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Subject: Re: [secdir] SECDIR Re-Reveiw of draft-ietf-hip-dex
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With Miika's help, I have fixed this in -21.

Thank you.

On 7/5/20 10:30 PM, Donald Eastlake wrote:
> Hi,
>
> I have checked the current -20 version of this draft against my 
> previous review below. All my comments are resolved except that I 
> think the plural of SHOULD is SHOULDs, not SHOULDS, and there are 
> still occurrences of SHOULDS in Appendix B of the draft.
>
> Thanks,
> Donald
> ===============================
>  Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
>  2386 Panoramic Circle, Apopka, FL 32703 USA
> d3e3e3@gmail.com <mailto:d3e3e3@gmail.com>
>
> ---------- Forwarded message ---------
> From: *Donald Eastlake* <d3e3e3@gmail.com <mailto:d3e3e3@gmail.com>>
> Date: Mon, Jan 20, 2020 at 11:18 PM
> Subject: SECDIR Reveiw of draft-ietf-hip-dex-11
> To: <draft-ietf-hip-dex.all@ietf.org 
> <mailto:draft-ietf-hip-dex.all@ietf.org>>
> Cc: iesg@ietf.org <mailto:iesg@ietf.org> <iesg@ietf.org 
> <mailto:iesg@ietf.org>>, secdir <secdir@ietf.org <mailto:secdir@ietf.org>>
>
> I have reviewed this document as (a very late) part of the security
> directorate's ongoing effort to review all IETF documents being
> processed by the IESG.
>
> The summary of the review is Ready with Nits.
>
> Sorry to get this review in so late but, while approved by the IESG,
> the draft is still in revised draft needed state so this may do some
> good. On the security front, although the draft is pretty complex and
> I am not that familiar with HIP, I did not see any significant
> security issues that were not already called out in the draft. So I
> concentrated on possible editorial issues.
>
> Editorial:
>
> Section 1.1, 3rd paragraph, page 5. Delete "However," a the beginning
> of the 2nd sentence. It doesn't make sense.
>
> Section 2.3, Definitions should be in alphabetic order.
>
> Section 2.3: It seems to me that people who are puzzled about what
> something means are most likely to be puzzled by the acronym. So I
> would put the acronym first, where there is an acronym or acronym-like
> term to use, then the expansion in parenthesis or in the body of the
> definition. This done for a couple of entries like CMAC and CKDF but
> most are the other way.
>
> Section 3 last paragraph and Section 12.10 5th bullet: "to use" -> 
> "use of"
>
> I think OGA  and KEYMAT should be in the Definitions list and KEYMAT,
> which I assume just is short for "keying material", should be expanded
> on first use in Section 6.3. Alternatively, you could just replace all
> occurrences of KEYMAT with "Keying Material".
>
> Section 5.3.2, page 23. The first sentence of the first paragraph
> starting on that page has problems. Maybe "chose" should be "choses"
> but I'm not sure:
>   "The DH_GROUP_LIST parameter contains the Responder's order of
>    preference based on which the Responder chose the ECDH key contained
>    in the HOST_ID parameter (see below)."
>
> Appendix A, first sentence, "allows to identify" -> "allows identifying"
>
> Appendix B, "IEDG" -> "IESG"
>
> Appendix B, around the middle of page 51, right after the line
> beginning with "Section 6," there are three line with a blank line
> before and after. I found this confusing at first. I suggest those
> three line also be indented.
>
> Appendix B, page 52, "SHOUDS" -> "SHOUDs"
>
> Thanks,
> Donald
> ===============================
>  Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
>  2386 Panoramic Circle, Apopka, FL 32703 USA
> d3e3e3@gmail.com <mailto:d3e3e3@gmail.com>

-- 
Standard Robert Moskowitz
Owner
HTT Consulting
C:248-219-2059
F:248-968-2824
E:rgm@labs.htt-consult.com

There's no limit to what can be accomplished if it doesn't matter who 
gets the credit

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  <body>
    With Miika's help, I have fixed this in -21.  <br>
    <br>
    Thank you.<br>
    <br>
    <div class="moz-cite-prefix">On 7/5/20 10:30 PM, Donald Eastlake
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAF4+nEGugeTKFvuNRFDQTvYKBG8EexAYwxVaiHMfK1rOEkwsag@mail.gmail.com">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <div dir="ltr">
        <div>Hi,</div>
        <div><br>
        </div>
        <div>I have checked the current -20 version of this draft
          against my previous review below. All my comments are resolved
          except that I think the plural of SHOULD is SHOULDs, not
          SHOULDS, and there are still occurrences of SHOULDS in
          Appendix B of the draft.<br>
        </div>
        <div><br>
        </div>
        <div>
          <div dir="ltr" data-smartmail="gmail_signature">Thanks,<br>
            Donald<br>
            ===============================<br>
             Donald E. Eastlake 3rd   +1-508-333-2270 (cell)<br>
             2386 Panoramic Circle, Apopka, FL 32703 USA<br>
             <a href="mailto:d3e3e3@gmail.com" target="_blank"
              moz-do-not-send="true">d3e3e3@gmail.com</a></div>
        </div>
        <br>
        <div class="gmail_quote">
          <div dir="ltr" class="gmail_attr">---------- Forwarded message
            ---------<br>
            From: <strong class="gmail_sendername" dir="auto">Donald
              Eastlake</strong> <span dir="auto">&lt;<a
                href="mailto:d3e3e3@gmail.com" target="_blank"
                moz-do-not-send="true">d3e3e3@gmail.com</a>&gt;</span><br>
            Date: Mon, Jan 20, 2020 at 11:18 PM<br>
            Subject: SECDIR Reveiw of draft-ietf-hip-dex-11<br>
            To: &lt;<a href="mailto:draft-ietf-hip-dex.all@ietf.org"
              target="_blank" moz-do-not-send="true">draft-ietf-hip-dex.all@ietf.org</a>&gt;<br>
            Cc: <a href="mailto:iesg@ietf.org" target="_blank"
              moz-do-not-send="true">iesg@ietf.org</a> &lt;<a
              href="mailto:iesg@ietf.org" target="_blank"
              moz-do-not-send="true">iesg@ietf.org</a>&gt;, secdir &lt;<a
              href="mailto:secdir@ietf.org" target="_blank"
              moz-do-not-send="true">secdir@ietf.org</a>&gt;<br>
          </div>
          <br>
          I have reviewed this document as (a very late) part of the
          security<br>
          directorate's ongoing effort to review all IETF documents
          being<br>
          processed by the IESG.<br>
          <br>
          The summary of the review is Ready with Nits.<br>
          <br>
          Sorry to get this review in so late but, while approved by the
          IESG,<br>
          the draft is still in revised draft needed state so this may
          do some<br>
          good. On the security front, although the draft is pretty
          complex and<br>
          I am not that familiar with HIP, I did not see any significant<br>
          security issues that were not already called out in the draft.
          So I<br>
          concentrated on possible editorial issues.<br>
          <br>
          Editorial:<br>
          <br>
          Section 1.1, 3rd paragraph, page 5. Delete "However," a the
          beginning<br>
          of the 2nd sentence. It doesn't make sense.<br>
          <br>
          Section 2.3, Definitions should be in alphabetic order.<br>
          <br>
          Section 2.3: It seems to me that people who are puzzled about
          what<br>
          something means are most likely to be puzzled by the acronym.
          So I<br>
          would put the acronym first, where there is an acronym or
          acronym-like<br>
          term to use, then the expansion in parenthesis or in the body
          of the<br>
          definition. This done for a couple of entries like CMAC and
          CKDF but<br>
          most are the other way.<br>
          <br>
          Section 3 last paragraph and Section 12.10 5th bullet: "to
          use" -&gt; "use of"<br>
          <br>
          I think OGA  and KEYMAT should be in the Definitions list and
          KEYMAT,<br>
          which I assume just is short for "keying material", should be
          expanded<br>
          on first use in Section 6.3. Alternatively, you could just
          replace all<br>
          occurrences of KEYMAT with "Keying Material".<br>
          <br>
          Section 5.3.2, page 23. The first sentence of the first
          paragraph<br>
          starting on that page has problems. Maybe "chose" should be
          "choses"<br>
          but I'm not sure:<br>
            "The DH_GROUP_LIST parameter contains the Responder's order
          of<br>
             preference based on which the Responder chose the ECDH key
          contained<br>
             in the HOST_ID parameter (see below)."<br>
          <br>
          Appendix A, first sentence, "allows to identify" -&gt; "allows
          identifying"<br>
          <br>
          Appendix B, "IEDG" -&gt; "IESG"<br>
          <br>
          Appendix B, around the middle of page 51, right after the line<br>
          beginning with "Section 6," there are three line with a blank
          line<br>
          before and after. I found this confusing at first. I suggest
          those<br>
          three line also be indented.<br>
          <br>
          Appendix B, page 52, "SHOUDS" -&gt; "SHOUDs"<br>
          <br>
          Thanks,<br>
          Donald<br>
          ===============================<br>
           Donald E. Eastlake 3rd   +1-508-333-2270 (cell)<br>
           2386 Panoramic Circle, Apopka, FL 32703 USA<br>
           <a href="mailto:d3e3e3@gmail.com" target="_blank"
            moz-do-not-send="true">d3e3e3@gmail.com</a><br>
        </div>
      </div>
    </blockquote>
    <br>
    <div class="moz-signature">-- <br>
      <meta content="text/html; charset=UTF-8" http-equiv="content-type">
      <title>Standard</title>
      <span style="font-family: Arial;">Robert Moskowitz</span><br
        style="font-family: Arial;">
      <span style="font-family: Arial;">
        Owner</span><br style="font-family: Arial;">
      <span style="font-family: Arial;">
        HTT Consulting</span><br>
      <span style="font-family: Arial;">C:</span><x-tab
        style="font-family: Arial;">      </x-tab><span
        style="font-family: Arial;">248-219-2059</span><br
        style="font-family: Arial;">
      <span style="font-family: Arial;">
        F:</span><x-tab style="font-family: Arial;">      </x-tab><span
        style="font-family: Arial;">248-968-2824</span><br
        style="font-family: Arial;">
      <span style="font-family: Arial;">
        E:</span><x-tab style="font-family: Arial;">      </x-tab><span
        style="font-family: Arial;"><a class="moz-txt-link-abbreviated" href="mailto:rgm@labs.htt-consult.com">rgm@labs.htt-consult.com</a></span><br
        style="font-family: Arial;">
      <br style="font-family: Arial;">
      <span style="font-family: Arial;">
        There's no limit to what can be accomplished if it doesn't
        matter who gets the credit</span><br>
    </div>
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From nobody Fri Jul 10 09:36:34 2020
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Review instructions and related resources are at:
http://tools.ietf.org/area/sec/trac/wiki/SecDirReview

For telechat 2020-07-16

Reviewer               LC end     Draft
Leif Johansson         2020-07-08 draft-ietf-lsr-isis-invalid-tlv-02
Charlie Kaufman       R2020-02-20 draft-ietf-lpwan-coap-static-context-hc-15

Last calls:

Reviewer               LC end     Draft
John Bradley           2020-02-28 draft-ietf-regext-data-escrow-10
Daniel Franke          2020-03-09 draft-ietf-regext-dnrd-objects-mapping-08
Daniel Gillmor         2020-06-12 draft-ietf-pce-stateful-pce-lsp-scheduling-19
Phillip Hallam-Baker   2020-06-11 draft-ietf-dots-use-cases-25
Dan Harkins            None       draft-ietf-rtgwg-policy-model-03
Leif Johansson         2020-07-08 draft-ietf-lsr-isis-invalid-tlv-02
Charlie Kaufman       R2020-02-20 draft-ietf-lpwan-coap-static-context-hc-15
Aanchal Malhotra       2020-07-27 draft-allan-5g-fmc-encapsulation-04
David Mandelberg       2020-07-14 draft-ietf-idr-rfc8203bis-06
Alexey Melnikov        2020-07-21 draft-ietf-mmusic-msrp-usage-data-channel-21
Adam Montville         2020-07-21 draft-ietf-bess-rfc5549revision-04
Kathleen Moriarty      2020-07-20 draft-ietf-ace-oscore-profile-11
Russ Mundy             2020-07-20 draft-ietf-ace-dtls-authorize-12
Russ Mundy             2020-01-02 draft-ietf-dprive-bcp-op-13
Sandra Murphy          None       draft-ietf-netconf-keystore-18
Yoav Nir               None       draft-ietf-netconf-trust-anchors-11
Hilarie Orman          2020-07-09 draft-ietf-acme-email-smime-08
Vincent Roca           2020-04-23 draft-ietf-detnet-ip-over-mpls-06
Stefan Santesson       2020-05-04 draft-ietf-httpbis-header-structure-19
Tina Tsou              2020-05-08 draft-ietf-httpbis-client-hints-15
Samuel Weiler          2020-06-11 draft-ietf-trill-multilevel-single-nickname-12
Klaas Wierenga         2020-05-26 draft-ietf-kitten-krb-spake-preauth-09
Paul Wouters           2020-05-25 draft-ietf-capport-architecture-08
Liang Xia             R2020-07-16 draft-ietf-cellar-ffv1-16
Dacheng Zhang          2020-03-12 draft-nottingham-how-did-that-get-into-the-repo-01
Dacheng Zhang          2019-11-05 draft-ietf-mpls-ri-rsvp-frr-07

Early review requests:

Reviewer               Due        Draft
Magnus Nystrom         2020-08-06 draft-ietf-netconf-keystore-18

Next in the reviewer rotation:

  Radia Perlman
  Derrell Piper
  Tirumaleswar Reddy.K
  Vincent Roca
  Kyle Rose
  Joseph Salowey
  Rich Salz
  Stefan Santesson
  Yaron Sheffer
  Rifaat Shekh-Yusef




From nobody Fri Jul 10 16:12:02 2020
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Date: Fri, 10 Jul 2020 16:11:50 -0700
From: Benjamin Kaduk <kaduk@mit.edu>
To: Stephen Farrell <stephen.farrell@cs.tcd.ie>
Cc: secdir@ietf.org
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Subject: Re: [secdir] [Last-Call] Secdir last call review of draft-ietf-pim-igmp-mld-snooping-yang-15
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Hi Stephen,

Thanks for that.  I had a bit more time and asked (via Discuss) about which
semantics a boolean 'true' should map to for one node that seemed unclear
to me.

-Ben

On Mon, Jul 06, 2020 at 08:07:31AM -0700, Stephen Farrell via Datatracker wrote:
> Reviewer: Stephen Farrell
> Review result: Ready
> 
> To the extent that a quick scan of the text (all I had time for) can help with 
> checking a yang model, I didn't see anything here that needs addressing.
> 
> 
> -- 
> last-call mailing list
> last-call@ietf.org
> https://www.ietf.org/mailman/listinfo/last-call


From nobody Mon Jul 13 07:17:29 2020
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Date: Mon, 13 Jul 2020 16:17:12 +0200
From: Christian =?iso-8859-1?Q?Ams=FCss?= <christian@amsuess.com>
To: core@ietf.org, Russ Housley <housley@vigilsec.com>, gen-art@ietf.org, Adam Montville <adam.montville.sdo@gmail.com>, secdir@ietf.org
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Subject: Re: [secdir] [core] I-D Action: draft-ietf-core-resource-directory-25.txt
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Hello Russ and Adam,

On Mon, Jul 13, 2020 at 06:42:09AM -0700, internet-drafts@ietf.org wrote:
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-core-resource-directory/

the newly submitted -25 was uploaded to address the points you've
brought up in your respective reviews.

Most noteworthy -- especially because it may affect the secdir review --
are the changes to the security policies section that caught Major
Concerns around the use of concrete security mechanisms.  Discussion
during the April interim meeting[1] has shown that the text had caught a
drift towards giving concrete and detailled (and in some details wrong)
measures without consideration for the bigger picture, which encompasses
a variety of applications with a wild variety of assurances they may or
may not need from an RD.

Consequently, that section that previously stated which parts of the RD
are protected now describes aspects that an application should consider
when deciding on a particular security model to employ.

The remaining changes should be sufficiently described in the changelog
and copied below for completeness.

Thanks again for your reviews
Christian


[1]: https://datatracker.ietf.org/doc/minutes-interim-2020-core-02-20200416=
1500/


Remaining change log:

*  Add concrete suggestions (twice as long as registrant number with
   retries, or UUIDs without) for random endpoint names

*  Point out that simple registration can have faked origins,
   RECOMMEND mitigation when applicable and suggest the Echo mechanism
   to implement it.

*  Reference existing and upcoming specifications for DDOS mitigation
   in CoAP.

*  Explain the provenance of the example's multicast address.

*  Make "SHOULD" of not manipulating foreign registrations a "should"
   and explain how it is enforced

*  Clarify application of RFC6570 to search parameters

*  Syntactic fixes in examples

*  IANA:

   -  Don't announce expected number of registrations (goes to write-
      up)

   -  Include syntax as part of a field's validity in entry
      requirements

*  Editorial changes

   -  Align wording between abstract and introduction

   -  Abbreviation normalization: "ER model", "RD"

   -  RFC8174 boilerplate update

   -  Minor clarity fixes

   -  Markup and layouting

--=20
To use raw power is to make yourself infinitely vulnerable to greater power=
s.
  -- Bene Gesserit axiom

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From: "Peterson, Jon" <jon.peterson@team.neustar>
To: Phillip Hallam-Baker <hallam@gmail.com>, "secdir@ietf.org" <secdir@ietf.org>
CC: "draft-ietf-stir-passport-divert.all@ietf.org" <draft-ietf-stir-passport-divert.all@ietf.org>, "last-call@ietf.org" <last-call@ietf.org>, "stir@ietf.org" <stir@ietf.org>
Thread-Topic: Secdir last call review of draft-ietf-stir-passport-divert-07
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From: Roman Danyliw <rdd@cert.org>
To: Greg Mirsky <gregimirsky@gmail.com>, Charlie Kaufman <charliekaufman@outlook.com>
CC: "draft-ietf-ippm-stamp-option-tlv.all@ietf.org" <draft-ietf-ippm-stamp-option-tlv.all@ietf.org>, "secdir@ietf.org" <secdir@ietf.org>
Thread-Topic: [secdir] Secdir review of draft-ietf-ippm-stamp-option-tlv-06
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Date: Mon, 13 Jul 2020 18:30:25 +0000
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From nobody Mon Jul 13 13:54:46 2020
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From: Leif Johansson via Datatracker <noreply@ietf.org>
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Cc: last-call@ietf.org, lsr@ietf.org, draft-ietf-lsr-isis-invalid-tlv.all@ietf.org
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Date: Mon, 13 Jul 2020 13:54:37 -0700
Archived-At: <https://mailarchive.ietf.org/arch/msg/secdir/O81Wf1GCoPk4kUQqTbg3g3LyF6E>
Subject: [secdir] Secdir last call review of draft-ietf-lsr-isis-invalid-tlv-02
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Reviewer: Leif Johansson
Review result: Ready

I have reviewed this document as part of the security directorate's 
ongoing effort to review all IETF documents being processed by the 
IESG.  These comments were written primarily for the benefit of the 
security area directors.  Document editors and WG chairs should treat 
these comments just like any other last call comments.

The subject matter is outside my area of expertise but addressing the 
obvious attack vector related to authenticated purge messages seems
like a good catch. 

The document is well written and clearly describes what registries
and documents are updated.



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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: Leif Johansson <leifj@sunet.se>, "secdir@ietf.org" <secdir@ietf.org>
CC: "last-call@ietf.org" <last-call@ietf.org>, "lsr@ietf.org" <lsr@ietf.org>,  "draft-ietf-lsr-isis-invalid-tlv.all@ietf.org" <draft-ietf-lsr-isis-invalid-tlv.all@ietf.org>
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From: Charlie Kaufman <charliekaufman@outlook.com>
To: "secdir@ietf.org" <secdir@ietf.org>, "iesg@ietf.org" <iesg@ietf.org>, "draft-ietf-lpwan-coap-static-context-hc.all@ietf.org" <draft-ietf-lpwan-coap-static-context-hc.all@ietf.org>
Thread-Topic: Secdir review of draft-ietf-lpwan-coap-static-context-hc-15
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Date: Tue, 14 Jul 2020 04:11:11 +0000
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Subject: [secdir] Secdir review of draft-ietf-lpwan-coap-static-context-hc-15
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--_000_CY4PR0701MB36501948B27189600943233BDF610CY4PR0701MB3650_
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

I have reviewed this document as part of the security directorate's ongoing=
 effort to review all IETF documents being processed by the IESG.  These co=
mments were written primarily for the benefit of the security area director=
s.  Document editors and WG chairs should treat these comments just like an=
y other last call comments.

This draft defines how SCHC (Static Context Header Compression) should be a=
pplied to the CoAP (Constrained Application Protocol). It appears that CoAP=
 is designed for low end devices speaking standard protocols with a lot of =
static content they would like to suppress to avoid wasting processing time=
 and communications overhead. That means that these devices are likely to b=
e generating and parsing the compressed content directly rather than genera=
ting the full content and then compressing it. One security considerations =
worth noting is that whenever compression is used with a protocol intended =
to be encrypted (which this one is), the question should be raised as to wh=
ether the compression can be leveraged by an attacker to make traffic analy=
sis more effective. In this case, I don't believe it can, but there should =
probably be an explanation of why in the security considerations. (The expl=
anation is that the values in earlier fields do not affect the compression =
of later fields, so an attacker cannot supply values whose length after com=
pression will leak the values of other compressed fields).

This document is very difficult to read and could use an editing pass by a =
native English speaker, but I suspect that is not its only problem. Synchro=
nizing the compression parameters is explicitly out of scope for this docum=
ent, but this document allows for so many different variations in the param=
eter settings that it's not clear whether these settings are intended to by=
 dynamically negotiated.

While there are lots of aspects of this specification that I'm uncertain ab=
out, I am fairly certain it does not introduce any security problems.

Details:

Introduction: What does "designed to easily interop with HTTP" mean?

Section 2 is confusing. For example:

"In the first example Figure 1, a Rule compresses the complete header stack=
 from IPv6 to CoAP. In this case, SCHC C/D (Static Context Header Compressi=
on Compressor/Decompressor) is performed at the Sender and at the Receiver.=
 The host communicating with the device do not implement SCHC C/D."

This text seems to make some distinction between the communications endpoin=
t and the host on which the communications endpoint runs. But its not clear=
 what the distinction is. I'm guessing there is a presumption that the host=
 processes the network layer headers and some application processes the pac=
ket "payload", but if so doing the IPv6 and UDP header compression within t=
he application makes no sense.

The punctuation around figures 1, 2, and 3 including:

((((((())))))) ----- ------ ------ -----

does not make a lot of sense. The figures could use more explanation as to =
what the columns mean.

Nits:

Capitalization of "RFC" should be consistent (in particular, in section 1.1=
: [RFC2119][rfc8174])

"still is too large for" -> "is still too large for"

"requires to install" -> "requires the installation of"

"device do not" -> "device does not"

"[rfc8724] document" -> "[rfc8724]"

Sorry... there are just too many nits to enumerate.


--_000_CY4PR0701MB36501948B27189600943233BDF610CY4PR0701MB3650_
Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
<style type=3D"text/css" style=3D"display:none;"> P {margin-top:0;margin-bo=
ttom:0;} </style>
</head>
<body dir=3D"ltr">
<div style=3D"color: rgb(0, 0, 0); font-family: Calibri,Helvetica,sans-seri=
f; font-size: 12pt;">
<div>I have reviewed this document as part of the security directorate's on=
going effort to review all IETF documents being processed by the IESG.&nbsp=
; These comments were written primarily for the benefit of the security are=
a directors.&nbsp; Document editors and WG
 chairs should treat these comments just like any other last call comments.=
</div>
<div><br>
</div>
<div>This draft defines how SCHC (Static Context Header Compression) should=
 be applied to the CoAP (Constrained Application Protocol). It appears that=
 CoAP is designed for low end devices speaking standard protocols with a lo=
t of static content they would like
 to suppress to avoid wasting processing time and communications overhead. =
That means that these devices are likely to be generating and parsing the c=
ompressed content directly rather than generating the full content and then=
 compressing it. One security considerations
 worth noting is that whenever compression is used with a protocol intended=
 to be encrypted (which this one is), the question should be raised as to w=
hether the compression can be leveraged by an attacker to make traffic anal=
ysis more effective. In this case,
 I don't believe it can, but there should probably be an explanation of why=
 in the security considerations. (The explanation is that the values in ear=
lier fields do not affect the compression of later fields, so an attacker c=
annot supply values whose length
 after compression will leak the values of other compressed fields).</div>
<div><br>
</div>
<div>This document is very difficult to read and could use an editing pass =
by a native English speaker, but I suspect that is not its only problem. Sy=
nchronizing the compression parameters is explicitly out of scope for this =
document, but this document allows
 for so many different variations in the parameter settings that it's not c=
lear whether these settings are intended to by dynamically negotiated.</div=
>
<div><br>
</div>
<div>While there are lots of aspects of this specification that I'm uncerta=
in about, I am fairly certain it does not introduce any security problems.<=
/div>
<div><br>
</div>
<div>Details:</div>
<div><br>
</div>
<div>Introduction: What does &quot;designed to easily interop with HTTP&quo=
t; mean?</div>
<div><br>
</div>
<div>Section 2 is confusing. For example:</div>
<div><br>
</div>
<div>&quot;In the first example Figure 1, a Rule compresses the complete he=
ader stack from IPv6 to CoAP. In this case, SCHC C/D (Static Context Header=
 Compression Compressor/Decompressor) is performed at the Sender and at the=
 Receiver. The host communicating with
 the device do not implement SCHC C/D.&quot;</div>
<div><br>
</div>
<div>This text seems to make some distinction between the communications en=
dpoint and the host on which the communications endpoint runs. But its not =
clear what the distinction is. I'm guessing there is a presumption that the=
 host processes the network layer
 headers and some application processes the packet &quot;payload&quot;, but=
 if so doing the IPv6 and UDP header compression within the application mak=
es no sense.</div>
<div><br>
</div>
<div>The punctuation around figures 1, 2, and 3 including:</div>
<div><br>
</div>
<div>((((((())))))) ----- ------ ------ -----</div>
<div><br>
</div>
<div>does not make a lot of sense. The figures could use more explanation a=
s to what the columns mean.</div>
<div><br>
</div>
<div>Nits:</div>
<div><br>
</div>
<div>Capitalization of &quot;RFC&quot; should be consistent (in particular,=
 in section 1.1: [RFC2119][rfc8174])</div>
<div><br>
</div>
<div>&quot;still is too large for&quot; -&gt; &quot;is still too large for&=
quot;</div>
<div><br>
</div>
<div>&quot;requires to install&quot; -&gt; &quot;requires the installation =
of&quot;</div>
<div><br>
</div>
<div>&quot;device do not&quot; -&gt; &quot;device does not&quot;</div>
<div><br>
</div>
<div>&quot;[rfc8724] document&quot; -&gt; &quot;[rfc8724]&quot;</div>
<div><br>
</div>
<div>Sorry... there are just too many nits to enumerate.<br>
</div>
<br>
</div>
</body>
</html>

--_000_CY4PR0701MB36501948B27189600943233BDF610CY4PR0701MB3650_--


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From: Rene Struik <rstruik.ext@gmail.com>
To: Russ Housley <housley@vigilsec.com>
Cc: IETF SecDir <secdir@ietf.org>, lwip@ietf.org, draft-ietf-lwig-curve-representations.all@ietf.org
References: <157479110201.13605.6894641490219218764@ietfa.amsl.com> <e7a4a264-b38d-5a0e-0418-90eb9684fc30@gmail.com> <FB616464-3605-443C-924F-42FF35F4E602@vigilsec.com> <f3aee8cc-ea7c-2d9f-974d-6f7f3991a340@gmail.com> <f6bd9629-7caa-cae4-15fe-a2581705935b@gmail.com>
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Subject: Re: [secdir] Secdir early review of draft-ietf-lwig-curve-representations-08
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Hi Russ:

It has been a while that you provided your early SecDir review comments. 
I do not know whether such early reviews are a gate keeper for sealing 
off the lwig curve draft. Nevertheless, it may be good to know if you 
are reasonably happy for this to move forward.

For some details on how I tried to take your comments into account, 
please see my March 10th email below, where the mailing list link is
https://mailarchive.ietf.org/arch/msg/lwip/P8kfrso7lvcbf4bpxJjcEpDxjNU/#

For the current draft, see
https://datatracker.ietf.org/doc/draft-ietf-lwig-curve-representations/

I am looking forward hearing back from you.

Best regards, Rene

On 2020-03-10 11:19 a.m., Rene Struik wrote:
> Hi Russ:
>
> I tried to take into account your comments with 
> draft-ietf-lwig-curve-representations-09.
>
> I will send out a separate email to the list highlighting main changes.
>
> Below, I will explain how I tried and accommodate your previous 
> comments on the 08-draft, now that the new draft is out.
>
> Important note:
> As you know from offline communications, I did include 
> Curve448-related material with the 09 version. I tried to do this in a 
> way that would create the least editorial upheaval and would not take 
> away from the main objectives of the document: to this end, I only 
> introduced Curve448-related material in Section 4.4 [thereby avoiding 
> having to sprinkle in curve448-related language in each section and 
> blurring the message of the document]. The only other sections where 
> Curve448 plays a role is IANA Section 10 and the appendices that give 
> the parameters and test vectors for the Curve448 family members. 
> {Note: I probably should have added a note on ECDSA448 in the security 
> consideration section, though (I made a note on this and will fix).}
>
>
> Best regards, Rene
>
> On 11/26/2019 5:21 PM, Rene Struik wrote:
>> Hi Russ:
>>
>> Thanks.
>>
>> On 11/26/2019 4:10 PM, Russ Housley wrote:
>>>
>>>> On Nov 26, 2019, at 2:54 PM, Rene Struik <rstruik.ext@gmail.com> 
>>>> wrote:
>>>>
>>>> Dear Russ:
>>>>
>>>> Thanks for your review (and speedy turn-around).
>>>>
>>>> Please find below feedback on how I intend to address all but your 
>>>> last remarks (I will reflect on your suggestion as to introductory 
>>>> text with the appendices when looking over Daniel Migault's earlier 
>>>> "guidance of the reader" remarks).
>>>>
>>>> Best regards, Rene
>>>>
>>>> On 11/26/2019 12:58 PM, Russ Housley via Datatracker wrote:
>>>>> Reviewer: Russ Housley
>>>>> Review result: Has Issues
>>>>>
>>>>> I reviewed this document as part of the Security Directorate's 
>>>>> ongoing
>>>>> effort to review all IETF documents being processed by the IESG.  
>>>>> These
>>>>> comments were written primarily for the benefit of the Security Area
>>>>> Directors.  Document authors, document editors, and WG chairs should
>>>>> treat these comments just like any other IETF Last Call comments.
>>>>>
>>>>> Document: draft-ietf-lwig-curve-representations-08
>>>>> Reviewer: Russ Housley
>>>>> Review Date: 2019-11-26
>>>>> IETF LC End Date: unknown
>>>>> IESG Telechat date: unknown
>>>>>
>>>>> Summary: Has Issues
>>>>>
>>>>>
>>>>> Major Concerns:
>>>>>
>>>>> I am confused by the first paragraph in Section 10.  It says that "An
>>>>> object identifier is requested ...", but then code points for COSE
>>>>> and JOSE (not object identifiers) are requested in the subsection.
>>>>>
>>>>> I am confused by the second paragraph in Section 10.  It says that
>>>>> "There is *currently* no further IANA action required ...". Please
>>>>> delete this paragraph.
>>>> RS>> If I remember this correctly, I borrowed this from another 
>>>> draft (but perhaps was somewhat ignorant here about proper 
>>>> formulation). I intend to change the first para to "code points are 
>>>> requested for ....". As to the second para, I believe it has some 
>>>> merit to keep this in, in slightly altered form, e.g.,  as "New 
>>>> object identifiers would be required in case one wishes to specify 
>>>> one or more of the "offspring" protocols exemplified in Section 
>>>> 4.4. Specification hereof is, however, outside scope of the current 
>>>> document."
>>>>
>>>> <<RS
>>> I do not see how the second paragraph gives any direction regarding 
>>> the IANA registries.
>>
>> RS>>  The requested algorithm registrations are for co-factor ECDH 
>> (Example 4.1) and ECDSA (Example 4.3), where the second para is more 
>> a reminder that one would need more registrations if one would like 
>> other spin-offs (so it was more to keep parallelism with Example 
>> 4.4). As example, one could instantiate e.g., Wei25519 plus, say, MQV 
>> (which NIST SP 800-56a + new curve W25519 in draft SP 186 would 
>> enable) and, e.g., Wei25519+MQV, Wei25519 + impl cert (for V2V; see 
>> IACR 2019-157), etc., but I did not wish to go over the top and that 
>> could be to be defined elsewhere. From a Spartan writing perspective, 
>> it could indeed be argued that one could guess this oneself. <<RS
>
> RS1>> Since I added Curve448-related material, I divided the IANA 
> section into two subsections, where the first one requests for code 
> points for Wei25519 and the second one requests for code points for 
> Wei448. The reason for this organization is that it shows clearly the 
> edits w.r.t. the 08 version. Due to the additional request for code 
> points for Wei448, I changed the language in the preamble of the IANA 
> section as follows:
>
> Code points are requested for curve Wei25519 and Wei448 and its use 
> with ECDSA and co-factor ECDH, using the representation conventions of 
> this document.
> New code points would be required in case one wishes to specify one or 
> more other "offspring" protocols beyond those exemplified in Section 
> 4.4. Specification hereof is, however, outside scope of the current 
> document.
>
> <<RS1
>
>>
>>>
>>>>> Minor Concerns:
>>>>>
>>>>> Requirements Language section is out of date.  It should reference
>>>>> RFC 8174 in addition to RFC 2119, as follows:
>>>>>
>>>>>     The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL 
>>>>> NOT",
>>>>>     "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", 
>>>>> "MAY", and
>>>>>     "OPTIONAL" in this document are to be interpreted as described in
>>>>>     BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in 
>>>>> all
>>>>>     capitals, as shown here.
>>>> RS>> will do. As minor point (from a non-native speaker's 
>>>> perspective): shouldn't the last part of the above sentence read 
>>>> "if, and only if, these appear...."? <<RS
>>> RFC 8174 calls for this exact text.
>> RS>> My remark above was more a "Strunk and White" remark. <<RS
> RS1>> Changed, as requested. <<RS1
>>>
>>>>> Section 2 says: "... reuse of existing generic code ...";  I do 
>>>>> not know
>>>>> what is meant by "generic".  It either needs to be defined, 
>>>>> reworded, or
>>>>> dropped.  I note that elsewhere in the document "existing code" is 
>>>>> used.
>>>> RS>> I will add a sentence to that effect, e.g., "(Here, generic 
>>>> code refers to an implementation that does not depend on hardcoded 
>>>> domain parameters (see also Section 6).)" <<RS
>>> Thanks.
>>>
>>>>> I expected Section 9 to say something about public keys being unique
>>>>> identifiers of the private key holder.
>>>> RS>> I will add an extra paragraph to this effect, e.g., "Use of a 
>>>> public key in any protocol for which successful execution evidences 
>>>> knowledge of the corresponding private key implicitly indicates the 
>>>> entity holding this private key. Reuse of this public key with more 
>>>> than one protocol or more than one protocol instantiation may, 
>>>> therefore, allow traceability of this entity." <<RS
>>> Also, using the same public key with different addresses allows an 
>>> observer to correlate them.
>> RS>> Indeed, one can correlate more stuff from meta-info that 
>> includes the public key as a common data element (even if the 
>> observer would not be able to check whether those are technically 
>> bound to this, this would often work in practice). <<RS
>
> RS1>>The added text now reads as follows:
>
> Use of a public key in any protocol for which successful execution 
> evidences knowledge of the corresponding private key implicitly 
> indicates the entity holding this private key. Reuse of this public 
> key with more than one protocol or more than one protocol 
> instantiation may, therefore, allow traceability of this entity. It 
> may also allow correlation of meta-data communicated with this common 
> data element (e.g., different addressing information), even if an 
> observer cannot technically verify the binding of this meta-data.
>
> <<RS1
>
>>>
>>>>> Some introduction text at the beginning of each Appendix would be 
>>>>> very
>>>>> helpful.  Please tell the reader what they will learn by delving into
>>>>> the subsections of the appendix.
>>>> RS>> I will reflect on this somewhat more (while also considering 
>>>> "guidance to the reader" remarks in Daniel Migault's Early IoTDir 
>>>> review).  Broadly speaking, though, inclusion of all these 
>>>> appendices makes the entire docment self-contained, including 
>>>> arithmetic, representations, how-to-convert details, etc. <<RS
>>> Yes, I understand that.  Some of the appendicies have introductory 
>>> text, but other do not.  I think they all should have introductory 
>>> text.
>
> RS1>> I added some introductory text to each appendix.
>
> <<RS1
>
>>>
>>>>> Nits:
>>>>>
>>>>> Section 4.2 says: "... at the end of hereof ...".  This does not tell
>>>>> me anything useful.  I suggest deleting this phrase.
>>>> RS>> I will change this to "at the end hereof" (i.e., will remove 
>>>> "of" - a glitch). Here, one can only recover the y-coordinate at 
>>>> the end of the Montgomery ladder, since one needs the x-coordinates 
>>>> of k*G and (k+1)*G to make this work. <<RS
>>> I think it would be better to say: ... at the end of the Montgomery 
>>> ladder ..."
> RS1>> Changed as suggested. <<RS1
>>>
>>> Russ
>>>
>>
>

-- 
email: rstruik.ext@gmail.com | Skype: rstruik
cell: +1 (647) 867-5658 | US: +1 (415) 287-3867


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Subject: Re: [secdir] Secdir early review of draft-ietf-lwig-curve-representations-08
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Rene:

It is not a gatekeeper of any sort.

I will not be able to another review for a couple of weeks.  You have =
asked at a particularly busy time for me.

Russ


> On Jul 14, 2020, at 1:45 PM, Rene Struik <rstruik.ext@gmail.com> =
wrote:
>=20
> Hi Russ:
>=20
> It has been a while that you provided your early SecDir review =
comments. I do not know whether such early reviews are a gate keeper for =
sealing off the lwig curve draft. Nevertheless, it may be good to know =
if you are reasonably happy for this to move forward.
>=20
> For some details on how I tried to take your comments into account, =
please see my March 10th email below, where the mailing list link is
> =
https://mailarchive.ietf.org/arch/msg/lwip/P8kfrso7lvcbf4bpxJjcEpDxjNU/#
>=20
> For the current draft, see
> =
https://datatracker.ietf.org/doc/draft-ietf-lwig-curve-representations/
>=20
> I am looking forward hearing back from you.
>=20
> Best regards, Rene
>=20
> On 2020-03-10 11:19 a.m., Rene Struik wrote:
>> Hi Russ:
>>=20
>> I tried to take into account your comments with =
draft-ietf-lwig-curve-representations-09.
>>=20
>> I will send out a separate email to the list highlighting main =
changes.
>>=20
>> Below, I will explain how I tried and accommodate your previous =
comments on the 08-draft, now that the new draft is out.
>>=20
>> Important note:
>> As you know from offline communications, I did include =
Curve448-related material with the 09 version. I tried to do this in a =
way that would create the least editorial upheaval and would not take =
away from the main objectives of the document: to this end, I only =
introduced Curve448-related material in Section 4.4 [thereby avoiding =
having to sprinkle in curve448-related language in each section and =
blurring the message of the document]. The only other sections where =
Curve448 plays a role is IANA Section 10 and the appendices that give =
the parameters and test vectors for the Curve448 family members. {Note: =
I probably should have added a note on ECDSA448 in the security =
consideration section, though (I made a note on this and will fix).}
>>=20
>>=20
>> Best regards, Rene
>>=20
>> On 11/26/2019 5:21 PM, Rene Struik wrote:
>>> Hi Russ:
>>>=20
>>> Thanks.
>>>=20
>>> On 11/26/2019 4:10 PM, Russ Housley wrote:
>>>>=20
>>>>> On Nov 26, 2019, at 2:54 PM, Rene Struik <rstruik.ext@gmail.com> =
wrote:
>>>>>=20
>>>>> Dear Russ:
>>>>>=20
>>>>> Thanks for your review (and speedy turn-around).
>>>>>=20
>>>>> Please find below feedback on how I intend to address all but your =
last remarks (I will reflect on your suggestion as to introductory text =
with the appendices when looking over Daniel Migault's earlier "guidance =
of the reader" remarks).
>>>>>=20
>>>>> Best regards, Rene
>>>>>=20
>>>>> On 11/26/2019 12:58 PM, Russ Housley via Datatracker wrote:
>>>>>> Reviewer: Russ Housley
>>>>>> Review result: Has Issues
>>>>>>=20
>>>>>> I reviewed this document as part of the Security Directorate's =
ongoing
>>>>>> effort to review all IETF documents being processed by the IESG.  =
These
>>>>>> comments were written primarily for the benefit of the Security =
Area
>>>>>> Directors.  Document authors, document editors, and WG chairs =
should
>>>>>> treat these comments just like any other IETF Last Call comments.
>>>>>>=20
>>>>>> Document: draft-ietf-lwig-curve-representations-08
>>>>>> Reviewer: Russ Housley
>>>>>> Review Date: 2019-11-26
>>>>>> IETF LC End Date: unknown
>>>>>> IESG Telechat date: unknown
>>>>>>=20
>>>>>> Summary: Has Issues
>>>>>>=20
>>>>>>=20
>>>>>> Major Concerns:
>>>>>>=20
>>>>>> I am confused by the first paragraph in Section 10.  It says that =
"An
>>>>>> object identifier is requested ...", but then code points for =
COSE
>>>>>> and JOSE (not object identifiers) are requested in the =
subsection.
>>>>>>=20
>>>>>> I am confused by the second paragraph in Section 10.  It says =
that
>>>>>> "There is *currently* no further IANA action required ...". =
Please
>>>>>> delete this paragraph.
>>>>> RS>> If I remember this correctly, I borrowed this from another =
draft (but perhaps was somewhat ignorant here about proper formulation). =
I intend to change the first para to "code points are requested for =
....". As to the second para, I believe it has some merit to keep this =
in, in slightly altered form, e.g.,  as "New object identifiers would be =
required in case one wishes to specify one or more of the "offspring" =
protocols exemplified in Section 4.4. Specification hereof is, however, =
outside scope of the current document."
>>>>>=20
>>>>> <<RS
>>>> I do not see how the second paragraph gives any direction regarding =
the IANA registries.
>>>=20
>>> RS>>  The requested algorithm registrations are for co-factor ECDH =
(Example 4.1) and ECDSA (Example 4.3), where the second para is more a =
reminder that one would need more registrations if one would like other =
spin-offs (so it was more to keep parallelism with Example 4.4). As =
example, one could instantiate e.g., Wei25519 plus, say, MQV (which NIST =
SP 800-56a + new curve W25519 in draft SP 186 would enable) and, e.g., =
Wei25519+MQV, Wei25519 + impl cert (for V2V; see IACR 2019-157), etc., =
but I did not wish to go over the top and that could be to be defined =
elsewhere. =46rom a Spartan writing perspective, it could indeed be =
argued that one could guess this oneself. <<RS
>>=20
>> RS1>> Since I added Curve448-related material, I divided the IANA =
section into two subsections, where the first one requests for code =
points for Wei25519 and the second one requests for code points for =
Wei448. The reason for this organization is that it shows clearly the =
edits w.r.t. the 08 version. Due to the additional request for code =
points for Wei448, I changed the language in the preamble of the IANA =
section as follows:
>>=20
>> Code points are requested for curve Wei25519 and Wei448 and its use =
with ECDSA and co-factor ECDH, using the representation conventions of =
this document.
>> New code points would be required in case one wishes to specify one =
or more other "offspring" protocols beyond those exemplified in Section =
4.4. Specification hereof is, however, outside scope of the current =
document.
>>=20
>> <<RS1
>>=20
>>>=20
>>>>=20
>>>>>> Minor Concerns:
>>>>>>=20
>>>>>> Requirements Language section is out of date.  It should =
reference
>>>>>> RFC 8174 in addition to RFC 2119, as follows:
>>>>>>=20
>>>>>>     The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL =
NOT",
>>>>>>     "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", =
"MAY", and
>>>>>>     "OPTIONAL" in this document are to be interpreted as =
described in
>>>>>>     BCP 14 [RFC2119] [RFC8174] when, and only when, they appear =
in all
>>>>>>     capitals, as shown here.
>>>>> RS>> will do. As minor point (from a non-native speaker's =
perspective): shouldn't the last part of the above sentence read "if, =
and only if, these appear...."? <<RS
>>>> RFC 8174 calls for this exact text.
>>> RS>> My remark above was more a "Strunk and White" remark. <<RS
>> RS1>> Changed, as requested. <<RS1
>>>>=20
>>>>>> Section 2 says: "... reuse of existing generic code ...";  I do =
not know
>>>>>> what is meant by "generic".  It either needs to be defined, =
reworded, or
>>>>>> dropped.  I note that elsewhere in the document "existing code" =
is used.
>>>>> RS>> I will add a sentence to that effect, e.g., "(Here, generic =
code refers to an implementation that does not depend on hardcoded =
domain parameters (see also Section 6).)" <<RS
>>>> Thanks.
>>>>=20
>>>>>> I expected Section 9 to say something about public keys being =
unique
>>>>>> identifiers of the private key holder.
>>>>> RS>> I will add an extra paragraph to this effect, e.g., "Use of a =
public key in any protocol for which successful execution evidences =
knowledge of the corresponding private key implicitly indicates the =
entity holding this private key. Reuse of this public key with more than =
one protocol or more than one protocol instantiation may, therefore, =
allow traceability of this entity." <<RS
>>>> Also, using the same public key with different addresses allows an =
observer to correlate them.
>>> RS>> Indeed, one can correlate more stuff from meta-info that =
includes the public key as a common data element (even if the observer =
would not be able to check whether those are technically bound to this, =
this would often work in practice). <<RS
>>=20
>> RS1>>The added text now reads as follows:
>>=20
>> Use of a public key in any protocol for which successful execution =
evidences knowledge of the corresponding private key implicitly =
indicates the entity holding this private key. Reuse of this public key =
with more than one protocol or more than one protocol instantiation may, =
therefore, allow traceability of this entity. It may also allow =
correlation of meta-data communicated with this common data element =
(e.g., different addressing information), even if an observer cannot =
technically verify the binding of this meta-data.
>>=20
>> <<RS1
>>=20
>>>>=20
>>>>>> Some introduction text at the beginning of each Appendix would be =
very
>>>>>> helpful.  Please tell the reader what they will learn by delving =
into
>>>>>> the subsections of the appendix.
>>>>> RS>> I will reflect on this somewhat more (while also considering =
"guidance to the reader" remarks in Daniel Migault's Early IoTDir =
review).  Broadly speaking, though, inclusion of all these appendices =
makes the entire docment self-contained, including arithmetic, =
representations, how-to-convert details, etc. <<RS
>>>> Yes, I understand that.  Some of the appendicies have introductory =
text, but other do not.  I think they all should have introductory text.
>>=20
>> RS1>> I added some introductory text to each appendix.
>>=20
>> <<RS1
>>=20
>>>>=20
>>>>>> Nits:
>>>>>>=20
>>>>>> Section 4.2 says: "... at the end of hereof ...".  This does not =
tell
>>>>>> me anything useful.  I suggest deleting this phrase.
>>>>> RS>> I will change this to "at the end hereof" (i.e., will remove =
"of" - a glitch). Here, one can only recover the y-coordinate at the end =
of the Montgomery ladder, since one needs the x-coordinates of k*G and =
(k+1)*G to make this work. <<RS
>>>> I think it would be better to say: ... at the end of the Montgomery =
ladder ..."
>> RS1>> Changed as suggested. <<RS1
>>>>=20
>>>> Russ
>>>>=20
>>>=20
>>=20
>=20
> --=20
> email: rstruik.ext@gmail.com | Skype: rstruik
> cell: +1 (647) 867-5658 | US: +1 (415) 287-3867
>=20


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Subject: [secdir] Security review of draft-ietf-acme-email-smime-08
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Security review of 
Extensions to Automatic Certificate Management Environment for end user
S/MIME certificates
draft-ietf-acme-email-smime-08

Do not be alarmed.  I generated this review of this document as part
of the security directorate's ongoing effort to review all IETF
documents being processed by the IESG.  These comments were written
with the intent of improving security requirements and considerations
in IETF drafts.  Comments not addressed in last call may be included
in AD reviews during the IESG review.  Document editors and WG chairs
should treat these comments just like any other last call comments.

The abstract states:
  "This document specifies identifiers and challenges required to enable
  the Automated Certificate Management Environment (ACME) to issue
  certificates for use by email users that want to use S/MIME."

I would restate this as "a specification of a challenge/response
protocol that is part of issuing ACME certificates to email accounts."

There doesn't seem to be anything in particular that ties this
document to S/MIME.  It would certainly be useful for using S/MIME,
but it is not necessary to have it in the title.

The protocol under discussion is a small part of ACME, and it appears
to be what results immediately from a request for a certificate.  In
section 3, last paragraph, there is a brief allusion to this context,
in the mention of the email address in a "CSR".  This would be
usefully augmented by using the text as in ACME, i.e., "a PKCS#10
[RFC2986] Certificate Signing Request (CSR)."

There's an assumption that the ability to reply to a challenge email from
the certificate server demonstrates "control" of the email account,
and therefore the possession of the private key for the certificate
demonstrates to a third party the "control" of the email account.  

The security considerations note that the requester's email system
might not be secure, and that email accounts might be shared, but
there is reference to the "account owner".  I don't think that there
is a formal notion of an account owner for email, perhaps it shouldn't
be mentioned.  The protocol demonstrates that an entity can see email
sent to the email address and can respond from that email address.
That is not necessarily "control", so I would replace that term with
something more neutral, like "access".

The challenge message must be protected with S/MIME signing or DKIM
signing, and pass DMARC validation.  The response message must be DKIM
signed.  Are there any requirements on the the certificate issuer's or
requester's policy for DKIM/SPF/DMARC?

This layering of security mechanisms raises the question of what do
they accomplish?  The document recommends that email system
administrators use DNSSEC to protect records that protect email, but
it isn't required.  Under what circumstances should the email user
feel confident in the issued certificate?  If it is used with S/MIME,
how much confidence should the recipient have in the certificate?  The
answer depends on a lot of factors in the details of DNS and email
infrastructure for the certificate issuer and the certificate
requester.

The ACME specification has a detailed discussion of security.  By
introducing email into protocol, this extension seems to raise new
security considerations that should be addressed in similar detail.


Hilarie


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Review instructions and related resources are at:
http://tools.ietf.org/area/sec/trac/wiki/SecDirReview

Last calls:

Reviewer               LC end     Draft
John Bradley           2020-02-28 draft-ietf-regext-data-escrow-10
Daniel Franke          2020-03-09 draft-ietf-regext-dnrd-objects-mapping-08
Daniel Gillmor         2020-06-12 draft-ietf-pce-stateful-pce-lsp-scheduling-22
Dan Harkins            None       draft-ietf-rtgwg-policy-model-03
Aanchal Malhotra       2020-07-27 draft-allan-5g-fmc-encapsulation-04
David Mandelberg       2020-07-14 draft-ietf-idr-rfc8203bis-06
Alexey Melnikov        2020-07-21 draft-ietf-mmusic-msrp-usage-data-channel-22
Kathleen Moriarty      2020-07-20 draft-ietf-ace-oscore-profile-11
Russ Mundy             2020-07-20 draft-ietf-ace-dtls-authorize-12
Sandra Murphy          None       draft-ietf-netconf-keystore-19
Yoav Nir               None       draft-ietf-netconf-trust-anchors-12
Radia Perlman          2020-07-21 draft-ietf-bess-rfc5549revision-04
Vincent Roca           2020-04-23 draft-ietf-detnet-ip-over-mpls-06
Samuel Weiler          2020-06-11 draft-ietf-trill-multilevel-single-nickname-12
Klaas Wierenga         2020-05-26 draft-ietf-kitten-krb-spake-preauth-09
Paul Wouters           2020-05-25 draft-ietf-capport-architecture-08
Liang Xia             R2020-07-16 draft-ietf-cellar-ffv1-16
Dacheng Zhang          2020-03-12 draft-nottingham-how-did-that-get-into-the-repo-01
Dacheng Zhang          2019-11-05 draft-ietf-mpls-ri-rsvp-frr-07

Early review requests:

Reviewer               Due        Draft
Magnus Nystrom         2020-08-06 draft-ietf-netconf-keystore-19

Next in the reviewer rotation:

  Derrell Piper
  Tirumaleswar Reddy.K
  Vincent Roca
  Kyle Rose
  Joseph Salowey
  Rich Salz
  Stefan Santesson
  Yaron Sheffer
  Rifaat Shekh-Yusef
  Melinda Shore




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Subject: [secdir] [new-work] WG Review: Network File System Version 4 (nfsv4)
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The Network File System Version 4 (nfsv4) WG in the Transport Area of the
IETF is undergoing rechartering. The IESG has not made any determination yet.
The following draft charter was submitted, and is provided for informational
purposes only. Please send your comments to the IESG mailing list
(iesg@ietf.org) by 2020-07-27.

Network File System Version 4 (nfsv4)
-----------------------------------------------------------------------
Current status: Active WG

Chairs:
  David Noveck <davenoveck@gmail.com>
  Brian Pawlowski <beepee@gmail.com>

Secretaries:
  Thomas Haynes <loghyr@hammer.space>

Assigned Area Director:
  Magnus Westerlund <magnus.westerlund@ericsson.com>

Transport Area Directors:
  Magnus Westerlund <magnus.westerlund@ericsson.com>
  Martin Duke <martin.h.duke@gmail.com>

Technical advisors:
  Leif Johansson <leifj@sunet.se>

Mailing list:
  Address: nfsv4@ietf.org
  To subscribe: https://www.ietf.org/mailman/listinfo/nfsv4
  Archive: https://mailarchive.ietf.org/arch/browse/nfsv4/

Group page: https://datatracker.ietf.org/group/nfsv4/

Charter: https://datatracker.ietf.org/doc/charter-ietf-nfsv4/

Network File System version 4 (NFSv4) is the IETF standard for file
sharing.

To maintain NFS Version 4's utility and currency, the NFSv4 working
group is chartered to maintain the existing NFSv4.0, NFSv4.1, and
NFSv4.2 protocols and specifications of related ONC components, such as
those defining RPC, XDR, and RPCSECGSS.

The NFSv4 working group is also responsible for maintenance and
extension of the RDMA protocols originally developed by the
now-concluded RDDP WG (RFCs 5040-5045, e.g., RDMAP, DDP and MPA) ,
whose maintenance and extension were previously handled by the
now-concluded STORM WG.

In addition, extensions will be developed, as necessary, to correct
problems with the protocols as currently specified, to accommodate
needed file system semantics, and to respond to technological
developments in the areas of networking and persistent storage/memory.

Maintenance

The working group's experience has been that, as NFSv4 implementations
mature and deployments continue, clarifications and corrections to
existing RFCs are needed.

These specification updates help vendors in delivering high-quality and
interoperable implementations.

The NFSv4 working group is chartered with vetting reported issues and
determining correctness of submitted errata.

In addition, some areas may need more concentrated work to correct the
specifications already published, to deal with unanticipated
interactions between features, or to respond to evolving expectations
with regard to areas such as security. Since necessary changes in such
cases are generally not appropriate for the errata system, the working
group will assist in publication of new RFCs that provide implementation
guidance, editorial modification or technical updates to existing RFCs.

Since the new NFSv4 versioning framework has been approved, these
technical updates to NFSv4 minor versions could include limited XDR
changes.

Extensions

The NFSv4 protocol is designed to allow extension by the definition of
new operations, new attributes, and new Parallel NFS layout types, as
well as the creation of minor versions.

Similarly, associated ONC protocol components that have a versioning/
extension framework can be incrementally extended, when necessary.

The working group will discuss proposals for such extensions and assure
that they have adequate technical review, including discussion of their
interaction with existing features, before adopting them as working
group items and helping to draft specification documents.

Some likely motivations for such extensions would be to:

 * Maximize NFS performance on advanced network fabrics.

 * Accommodate new storage technologies.

 * Provide facilities useful in management of NFS-accessed storage in
   large-scale virtualization environments.

 * Provide more effective NFS response to security challenges.

New milestones that fall within the scope specified in this charter can
be added to the list below after working group consensus and upon
approval by the responsible Area Director.

The WG will extend RDMA to enhance the Memory Placement operations
such as Flush, Atomic Write and Validation using Integrity Signatures.

Milestones:

  Mar 2021 - Request publication of RDMA Extensions for Enhanced Memory
  Placement



_______________________________________________
new-work mailing list
new-work@ietf.org
https://www.ietf.org/mailman/listinfo/new-work


From nobody Fri Jul 17 15:34:15 2020
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Date: Fri, 17 Jul 2020 15:34:08 -0700
From: Benjamin Kaduk <kaduk@mit.edu>
To: Charlie Kaufman <charliekaufman@outlook.com>
Cc: "secdir@ietf.org" <secdir@ietf.org>
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Subject: Re: [secdir] Secdir review of draft-ietf-ippm-stamp-option-tlv-06
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Hi Charlie,

Thanks for the review!  I entered a Discuss ballot to clear up the 6-to-4
gateway case and the "mix and match" scenario, as well as a few other
points (one of which is just a comment that I originally made on the STAMP
base specification and replayed here since the text in question got moved).

-Ben

On Sat, Jun 27, 2020 at 05:34:34AM +0000, Charlie Kaufman wrote:
> I have reviewed this document as part of the security directorate's ongoing effort to review all IETF documents being processed by the IESG.  These comments were written primarily for the benefit of the security area directors.  Document editors and WG chairs should treat these comments just like any other last call comments.
> 
> This I-D specifies extensions to the STAMP protocol defined in RFC 8762. The STAMP protocol runs over UDP and is similar to an "echo" protocol intended to be used to test network speed and bandwidth. This I-D specifies a series of TLV encoded extensions that can be appended to the end of the UDP packets of the STAMP protocol (as well as defining the TLV mechanism itself).
> 
> I could not find anything objectionable from a security standpoint in this extension mechanism. It is a bit odd that when extensions are added to an HMAC protected packet, instead of adding the extensions before the HMAC and having the HMAC protect the entire contents, they keep the existing HMAC that protects the base packet and add a second HMAC at the end of the extensions that protects only the extensions. This would potentially allow an attacker to "mix and match" the extensions from one packet with the base content of a different packet, but it's not clear what an attacker might be able to gain by doing that.
> 
> One of the pieces of information an extension can request is the 6 byte MAC address of the incoming packet as seen by the peer (which will normally by the MAC address of the last router on the path). That information is not normally available to someone on a distant network, but it's not obvious what harm could come from their knowing it.
> 
> The protocol can also request the source and destination IP addresses as seen by the peer (presumably to detect NAT gateways), but the protocol assumes the originator will know whether the peer will see IPv4 or IPv6 addresses, so dealing with 6-to-4 gateways could be tricky.
> 
> On page 19 table 2, this document asks IANA to assign extension type codes. In all other documents of this sort that I have seen, the document assigns the codes and asks IANA to track subsequent additions.
> 
> On some kinds of errors, the protocol specifies that the error is reported via and ICMP message. For others, it specifies that a field be returned containing all zeros. It's probably better to report errors "in band" because so many routers swallow ICMP messages. The spec does not - and should - specify what to do if the length of the TLV coded extensions does not match the length of the UDP packet containing them (or at least I couldn't find where it was specified).
> 
> --Charlie


From nobody Fri Jul 17 16:22:09 2020
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Date: Fri, 17 Jul 2020 16:22:00 -0700
From: Benjamin Kaduk <kaduk@mit.edu>
To: Charlie Kaufman <charliekaufman@outlook.com>
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Subject: Re: [secdir] Secdir review of draft-ietf-lpwan-coap-static-context-hc-15
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Hi Charlie,

Thanks for this review -- I repeated several of your comments, including
"interop with HTTP" and the unclear figures, and also referenced your
comments on the security considerations, while retaining my previous
Discuss ballot that I'm holding for legacy reasons (it's more of an
ART-area thing, really, but I happened to notice it first).

-Ben

On Tue, Jul 14, 2020 at 04:11:11AM +0000, Charlie Kaufman wrote:
> I have reviewed this document as part of the security directorate's ongoi=
ng effort to review all IETF documents being processed by the IESG.  These =
comments were written primarily for the benefit of the security area direct=
ors.  Document editors and WG chairs should treat these comments just like =
any other last call comments.
>=20
> This draft defines how SCHC (Static Context Header Compression) should be=
 applied to the CoAP (Constrained Application Protocol). It appears that Co=
AP is designed for low end devices speaking standard protocols with a lot o=
f static content they would like to suppress to avoid wasting processing ti=
me and communications overhead. That means that these devices are likely to=
 be generating and parsing the compressed content directly rather than gene=
rating the full content and then compressing it. One security consideration=
s worth noting is that whenever compression is used with a protocol intende=
d to be encrypted (which this one is), the question should be raised as to =
whether the compression can be leveraged by an attacker to make traffic ana=
lysis more effective. In this case, I don't believe it can, but there shoul=
d probably be an explanation of why in the security considerations. (The ex=
planation is that the values in earlier fields do not affect the compressio=
n of later fields, so an attacker cannot supply values whose length after c=
ompression will leak the values of other compressed fields).
>=20
> This document is very difficult to read and could use an editing pass by =
a native English speaker, but I suspect that is not its only problem. Synch=
ronizing the compression parameters is explicitly out of scope for this doc=
ument, but this document allows for so many different variations in the par=
ameter settings that it's not clear whether these settings are intended to =
by dynamically negotiated.
>=20
> While there are lots of aspects of this specification that I'm uncertain =
about, I am fairly certain it does not introduce any security problems.
>=20
> Details:
>=20
> Introduction: What does "designed to easily interop with HTTP" mean?
>=20
> Section 2 is confusing. For example:
>=20
> "In the first example Figure 1, a Rule compresses the complete header sta=
ck from IPv6 to CoAP. In this case, SCHC C/D (Static Context Header Compres=
sion Compressor/Decompressor) is performed at the Sender and at the Receive=
r. The host communicating with the device do not implement SCHC C/D."
>=20
> This text seems to make some distinction between the communications endpo=
int and the host on which the communications endpoint runs. But its not cle=
ar what the distinction is. I'm guessing there is a presumption that the ho=
st processes the network layer headers and some application processes the p=
acket "payload", but if so doing the IPv6 and UDP header compression within=
 the application makes no sense.
>=20
> The punctuation around figures 1, 2, and 3 including:
>=20
> ((((((())))))) ----- ------ ------ -----
>=20
> does not make a lot of sense. The figures could use more explanation as t=
o what the columns mean.
>=20
> Nits:
>=20
> Capitalization of "RFC" should be consistent (in particular, in section 1=
=2E1: [RFC2119][rfc8174])
>=20
> "still is too large for" -> "is still too large for"
>=20
> "requires to install" -> "requires the installation of"
>=20
> "device do not" -> "device does not"
>=20
> "[rfc8724] document" -> "[rfc8724]"
>=20
> Sorry... there are just too many nits to enumerate.
>=20

> _______________________________________________
> secdir mailing list
> secdir@ietf.org
> https://www.ietf.org/mailman/listinfo/secdir
> wiki: http://tools.ietf.org/area/sec/trac/wiki/SecDirReview


From nobody Mon Jul 20 05:46:52 2020
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To: "secdir@ietf.org" <secdir@ietf.org>
Cc: last-call@ietf.org, draft-ietf-mmusic-msrp-usage-data-channel.all@ietf.org
From: Alexey Melnikov <alexey.melnikov@isode.com>
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Date: Mon, 20 Jul 2020 13:46:42 +0100
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Subject: [secdir] Secdir last call review of draft-ietf-mmusic-msrp-usage-data-channel-22
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Reviewer: Alexey Melnikov
Review result: Ready with Nits

I have reviewed this document as part of the security directorate's=20
ongoing effort to review all IETF documents being processed by the IESG.=20
These comments were written primarily for the benefit of the security=20
area directors. Document editors and WG chairs should treat these=20
comments just like any other last call comments.

The subject matter is outside my area of expertise and proper=20
understanding of the document requires reading of several referenced=20
documents. But I think I got the gist of what the document is trying to do.

The Security Consideration talks about data channels providing=20
confidentiality, integrity and source authentication for MSRP traffic,=20
which is good. It also points out to discussion of MSRP message=20
attribution in RFC 4975.

However, session setup is done over SIP, which has different security=20
considerations and nothing is mentioned about that. In particular, one=20
of normatively referenced documents RFC 5547 has very good Security=20
Considerations section (section 10) that talks about possible attacks on=20
file transfer negotiation. I think this should be referenced in the=20
document.

I also feel that more can be said about possible use of MSRP for=20
transferring of malicious files/images.

In Section 6:

 =C2=A0o=C2=A0 The gateway SHALL use CEMA towards the non-data channel endpo=
int.

Please explain and/or add a reference for CEMA.


From nobody Mon Jul 20 07:39:54 2020
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From nobody Tue Jul 21 01:50:09 2020
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From: Alexey Melnikov <alexey.melnikov@isode.com>
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Subject: Re: [secdir] [Last-Call] Secdir last call review of draft-ietf-mmusic-msrp-usage-data-channel-22
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Hi Christer,

On 20/07/2020 15:39, Christer Holmberg wrote:
> Hi Alexey,
>
> Thank you for the review! Please see inline.
>
>> I have reviewed this document as part of the security directorate's ongoi=
ng effort to review all IETF documents being processed by the IESG.
>> These comments were written primarily for the benefit of the security are=
a directors. Document editors and WG chairs should treat these comments just=
 like any other last call comments.
>>
>> The subject matter is outside my area of expertise and proper understandi=
ng of the document requires reading of several referenced documents. But I t=
hink I got the gist of what the document is trying to do.
>>
>> The Security Consideration talks about data channels providing confidenti=
ality, integrity and source authentication for MSRP traffic, which is good. =
It also points out to discussion of MSRP message attribution in RFC 4975.
>>
>> However, session setup is done over SIP, which has different security con=
siderations and nothing is mentioned about that.
> The mechanism does not require SIP - it only requires use of offer/answer.
Ok.
> Granted, offer/answer is mostly used together with SIP, but there is no su=
ch requirement, and we normally reference the SIP Security Considerations in=
 offer/answer specifications.
I think you need to point this out explicitly in the security=20
consideration.
>> In particular, one of normatively referenced documents RFC 5547 has very =
good Security Considerations section (section 10) that talks about possible =
attacks on file transfer negotiation. I think this should be referenced in t=
he document.
> I suggest to add the following paragraph to the Security Considerations:
>
> "[RFC5547] specifies security considerations related to the usage of MSRP =
for file transfer."
Sounds good.
>> I also feel that more can be said about possible use of MSRP for transfer=
ring of malicious files/images.
> I think that belongs RFC 5547, and I think the text in 5547 is pretty good=
.
Actually, you are right, the last paragraph of Section 10 talks about this.
>> In Section 6:
>>
>>  =C2=A0o=C2=A0 The gateway SHALL use CEMA towards the non-data channel en=
dpoint.
>>
>> Please explain and/or add a reference for CEMA.
> We do have a reference to CEMA in Section 4.4., but I am fine adding it he=
re too:
>
> "o  The gateway SHALL use MSRP CEMA [RFC6714] towards the non-data channel=
 endpoint."

This is better, thank you.

Best Regards,

Alexey


From nobody Tue Jul 21 04:30:39 2020
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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Alexey Melnikov <alexey.melnikov@isode.com>, Christer Holmberg <christer.holmberg=40ericsson.com@dmarc.ietf.org>, "secdir@ietf.org" <secdir@ietf.org>
CC: "draft-ietf-mmusic-msrp-usage-data-channel.all@ietf.org" <draft-ietf-mmusic-msrp-usage-data-channel.all@ietf.org>, "last-call@ietf.org" <last-call@ietf.org>
Thread-Topic: [Last-Call] Secdir last call review of draft-ietf-mmusic-msrp-usage-data-channel-22
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Archived-At: <https://mailarchive.ietf.org/arch/msg/secdir/Zexwj6aq_P6hNnB4aAK0yUR6fGo>
Subject: Re: [secdir] [Last-Call] Secdir last call review of draft-ietf-mmusic-msrp-usage-data-channel-22
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From nobody Tue Jul 21 17:30:35 2020
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From: Liang Xia via Datatracker <noreply@ietf.org>
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Subject: [secdir] Secdir last call review of draft-ietf-cellar-ffv1-16
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Reviewer: Liang Xia
Review result: Ready

I have carried out the SecDir review for the -02 version, and all my nit
concerns are addressed in current -16 version.

But about my one question, I have not seen any response or actions: "Issues for
clarification: In Security Considerations, besides the DoS attacks brought by
the malicious payloads, is there any other kinds of attack possibly? For
example, virus or worm are hidden in the malicious payloads to attack the
system for more damages? Does it make sense and what's the consideration?"

This time, is there any clarification?
Thanks!




From nobody Thu Jul 23 05:57:47 2020
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Review instructions and related resources are at:
http://tools.ietf.org/area/sec/trac/wiki/SecDirReview

Last calls:

Reviewer               LC end     Draft
John Bradley           2020-02-28 draft-ietf-regext-data-escrow-10
Daniel Franke          2020-03-09 draft-ietf-regext-dnrd-objects-mapping-08
Daniel Gillmor         2020-06-12 draft-ietf-pce-stateful-pce-lsp-scheduling-22
Dan Harkins            None       draft-ietf-rtgwg-policy-model-03
Aanchal Malhotra       2020-07-27 draft-allan-5g-fmc-encapsulation-04
David Mandelberg       2020-07-14 draft-ietf-idr-rfc8203bis-06
Kathleen Moriarty      2020-07-20 draft-ietf-ace-oscore-profile-11
Russ Mundy             2020-07-20 draft-ietf-ace-dtls-authorize-12
Sandra Murphy          None       draft-ietf-netconf-keystore-19
Yoav Nir               None       draft-ietf-netconf-trust-anchors-12
Radia Perlman          2020-07-21 draft-ietf-bess-rfc5549revision-04
Vincent Roca           2020-04-23 draft-ietf-detnet-ip-over-mpls-06
Samuel Weiler          2020-06-11 draft-ietf-trill-multilevel-single-nickname-12
Klaas Wierenga         2020-05-26 draft-ietf-kitten-krb-spake-preauth-09
Paul Wouters           2020-05-25 draft-ietf-capport-architecture-08
Dacheng Zhang          2020-03-12 draft-nottingham-how-did-that-get-into-the-repo-01
Dacheng Zhang          2019-11-05 draft-ietf-mpls-ri-rsvp-frr-07

Early review requests:

Reviewer               Due        Draft
Magnus Nystrom         2020-08-06 draft-ietf-netconf-keystore-19

Next in the reviewer rotation:

  Derrell Piper
  Tirumaleswar Reddy.K
  Vincent Roca
  Kyle Rose
  Joseph Salowey
  Rich Salz
  Stefan Santesson
  Yaron Sheffer
  Rifaat Shekh-Yusef
  Melinda Shore




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From: Michael Richardson <mcr+ietf@sandelman.ca>
To: Liang Xia <frank.xialiang@huawei.com>
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Subject: Re: [secdir] [Cellar] Secdir last call review of draft-ietf-cellar-ffv1-16
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--=-=-=
Content-Type: text/plain


Liang Xia via Datatracker <noreply@ietf.org> wrote:
    > But about my one question, I have not seen any response or actions: "Issues for
    > clarification: In Security Considerations, besides the DoS attacks brought by
    > the malicious payloads, is there any other kinds of attack possibly? For
    > example, virus or worm are hidden in the malicious payloads to attack the
    > system for more damages? Does it make sense and what's the consideration?"

Hi, thank you for the review comments.
Aside from possible buffer-overflow attacks that would attempt to smash the
stack of a process, none of the content carried in ffv1 is intended to be executable.

A virus or worm hidden in the payload would be rendered as if it was visual
data by normal software processing.

Clearly, a malicious system could use the ffv1 format in an attempt to disquise
itself, but that would take a co-consipirator to extract that content.

--
Michael Richardson <mcr+IETF@sandelman.ca>, Sandelman Software Works
 -= IPv6 IoT consulting =-




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From: Radia Perlman <radiaperlman@gmail.com>
Date: Sun, 26 Jul 2020 19:24:21 -0700
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To: secdir@ietf.org, The IESG <iesg@ietf.org>,  draft-ietf-bess-rfc5549revision.all@ietf.org
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Subject: [secdir] Secdir review of draft-ietf-bess-rfc5549revision-04
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I have reviewed this document as part of the security directorate's ongoing
effort to review all IETF documents being processed by the IESG.  These
comments were written primarily for the benefit of the security area
directors.  Document editors and WG chairs should treat these comments just
like any other last call comments.



Summary: I have found no issues with the document.

This document specifies the extensions necessary to allow advertising IPv4
NLRI or VPN-IPV4 NLRI with an IPv6 next hop address.

The document is fine.


Nit: I didn't quite understand a word in the acknowledgement section

"  The authors would like to thank Francois Le Faucheur and Eric Rosen

   for the edition and their work on [RFC5549
<https://tools.ietf.org/html/rfc5549>]."

What do you mean by "edition"?  Do you perhaps mean "editing work"?

Would you still be properly acknowledging them if you removed the
words "the edition and", and made it simply "for their work

on RFC5549"?


Radia

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<div dir=3D"ltr">I have reviewed this document as part of the security dire=
ctorate&#39;s ongoing effort to review all IETF documents being processed b=
y the IESG.=C2=A0 These comments were written primarily for the benefit of =
the security area directors.=C2=A0 Document editors and WG chairs should tr=
eat these comments just like any other last call comments.<br><br><br><br>S=
ummary: I have found no issues with the document.<br><div><br></div><div>Th=
is document=C2=A0<span style=3D"color:rgb(0,0,0);font-size:13.3333px">speci=
fies the extensions necessary to allow advertising IPv4 NLRI or VPN-IPV4 NL=
RI with an IPv6 next hop address.</span></div><div><span style=3D"color:rgb=
(0,0,0);font-size:13.3333px"><br></span></div><pre style=3D"font-size:13.33=
33px;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0)">The document is fin=
e.  </pre><pre style=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0p=
x;color:rgb(0,0,0)"><br></pre><pre style=3D"font-size:13.3333px;margin-top:=
0px;margin-bottom:0px;color:rgb(0,0,0)">Nit: I didn&#39;t quite understand =
a word in the acknowledgement section</pre><pre style=3D"font-size:13.3333p=
x;margin-top:0px;margin-bottom:0px;color:rgb(0,0,0)">&quot;  The authors wo=
uld like to thank Francois Le Faucheur and Eric Rosen</pre><pre class=3D"gm=
ail-newpage" style=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;=
break-before:page;color:rgb(0,0,0)">   for the edition and their work on [<=
a href=3D"https://tools.ietf.org/html/rfc5549" title=3D"&quot;Advertising I=
Pv4 Network Layer Reachability Information with an IPv6 Next Hop&quot;">RFC=
5549</a>].&quot;</pre><pre class=3D"gmail-newpage" style=3D"font-size:13.33=
33px;margin-top:0px;margin-bottom:0px;break-before:page;color:rgb(0,0,0)">W=
hat do you mean by &quot;edition&quot;?  Do you perhaps mean &quot;editing =
work&quot;?</pre><pre class=3D"gmail-newpage" style=3D"font-size:13.3333px;=
margin-top:0px;margin-bottom:0px;break-before:page;color:rgb(0,0,0)">Would =
you still be properly acknowledging them if you removed the words &quot;the=
 edition and&quot;, and made it simply &quot;for their work</pre><pre class=
=3D"gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px;margin-botto=
m:0px;break-before:page;color:rgb(0,0,0)">on RFC5549&quot;?</pre><pre class=
=3D"gmail-newpage" style=3D"font-size:13.3333px;margin-top:0px;margin-botto=
m:0px;break-before:page;color:rgb(0,0,0)"><br></pre><pre class=3D"gmail-new=
page" style=3D"font-size:13.3333px;margin-top:0px;margin-bottom:0px;break-b=
efore:page;color:rgb(0,0,0)">Radia</pre></div>

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Subject: [secdir] Secdir last call review of draft-allan-5g-fmc-encapsulation-05
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Reviewer: Aanchal Malhotra
Review result: Ready

I have reviewed this document as part of the security directorate's 
ongoing effort to review all IETF documents being processed by the 
IESG. 
The summary of the review is that draft-allan-5g-fmc-encapsulation-05 is Ready for publication.


