Re: [secdir] secdir review of draft-ietf-isis-sbfd-discriminator-02
"Les Ginsberg (ginsberg)" <ginsberg@cisco.com> Wed, 18 November 2015 04:31 UTC
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From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: Tom Yu <tlyu@mit.edu>, "iesg@ietf.org" <iesg@ietf.org>, "secdir@ietf.org" <secdir@ietf.org>, "draft-ietf-isis-sbfd-discriminator.all@tools.ietf.org" <draft-ietf-isis-sbfd-discriminator.all@tools.ietf.org>
Thread-Topic: secdir review of draft-ietf-isis-sbfd-discriminator-02
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Date: Wed, 18 Nov 2015 04:31:53 +0000
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Subject: Re: [secdir] secdir review of draft-ietf-isis-sbfd-discriminator-02
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Tom - Thanx for the review. If you are not happy with the Security section of the base S-BFD draft it seems to me it makes the most sense to address any issues in that document. Trying to make up for any shortcomings in S-BFD draft by adding to the IGP drafts (there is a similar OSPF S-BFD draft) when the IGPs are merely acting as a transport for opaque information (as you say) does not seem appropriate to me. Can we close on this issue? Les > -----Original Message----- > From: Tom Yu [mailto:tlyu@mit.edu] > Sent: Tuesday, November 17, 2015 7:06 PM > To: iesg@ietf.org; secdir@ietf.org; draft-ietf-isis-sbfd- > discriminator.all@tools.ietf.org > Subject: secdir review of draft-ietf-isis-sbfd-discriminator-02 > > 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: ready with nits > > I agree with the first paragraph of the Security Considerations, in that I think > it's unlikely that this document introduces security risks for IS-IS, which as I > understand it, effectively transports the proposed S-BFD discriminators as an > uninterpreted opaque payload. > > The second paragraph > > Advertisement of the S-BFD discriminators does make it possible for > attackers to initiate S-BFD sessions using the advertised > information. The vulnerabilities this poses and how to mitigate them > are discussed in the Security Considerations section of [S-BFD]. > > refers to the Security Considerations of the [S-BFD] base document. The [S- > BFD] Security Considerations describe some strengthening practices, but > doesn't seem to describe the vulnerabilities in significant detail. > [S-BFD] Security Considerations seems to describe an attack where someone > impersonates the responder, but not one where someone impersonates an > initiator. > > Other sections of [S-BFD] might imply the existence of this sort of > vulnerability, but the Security considerations seems not to mention it > explicitly. I'm not sure whether it's best to leave things alone, revise this > document, or revise [S-BFD]. > > -Tom
- [secdir] secdir review of draft-ietf-isis-sbfd-di… Tom Yu
- Re: [secdir] secdir review of draft-ietf-isis-sbf… Les Ginsberg (ginsberg)
- Re: [secdir] secdir review of draft-ietf-isis-sbf… Tom Yu