Re: [trill] Stephen Farrell's Discuss on draft-ietf-trill-pseudonode-nickname-06: (with DISCUSS)

Donald Eastlake <d3e3e3@gmail.com> Thu, 17 September 2015 13:49 UTC

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From: Donald Eastlake <d3e3e3@gmail.com>
Date: Thu, 17 Sep 2015 09:49:27 -0400
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To: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Cc: draft-ietf-trill-pseudonode-nickname.shepherd@ietf.org, "trill-chairs@ietf.org" <trill-chairs@ietf.org>, draft-ietf-trill-pseudonode-nickname@ietf.org, The IESG <iesg@ietf.org>, "trill@ietf.org" <trill@ietf.org>, draft-ietf-trill-pseudonode-nickname.ad@ietf.org
Subject: Re: [trill] Stephen Farrell's Discuss on draft-ietf-trill-pseudonode-nickname-06: (with DISCUSS)
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Hi Stephen,

On Thu, Sep 17, 2015 at 6:34 AM, Stephen Farrell
<stephen.farrell@cs.tcd.ie> wrote:
> Stephen Farrell has entered the following ballot position for
> draft-ietf-trill-pseudonode-nickname-06: Discuss
>
> ...
>
> The document, along with other ballot positions, can be found here:
> https://datatracker.ietf.org/doc/draft-ietf-trill-pseudonode-nickname/
>
>
>
> ----------------------------------------------------------------------
> DISCUSS:
> ----------------------------------------------------------------------
>
>
> I have two questions where it's not clear to me if this
> specification does or does not introduce new vulnerabilities.
> It could well be that it does not and these are handled
> elsewhere, but I'm not sure so...
>
> (1) How is authorization for being a member of an RBv handled?

Currently I think that this is out of scope because the active-active
edge groups, each of which is represented by an RBv, are proprietary
MC-LAG implementations with proprietary management. (See bottom of
page 5 of RFC 7379. This draft is standardizing a TRILL campus facing
interface for an AAE group.)

> (2) If a rogue RB can add itself to an RBv can it arrange
> things so the rogue RB becomes the DF for the RBv?  (If so,
> that would seem to create new DoS opportunities at least.)

I don't see any problem in mentioning this in the Security Considerations.

Thanks,
Donald
=============================
 Donald E. Eastlake 3rd   +1-508-333-2270 (cell)
 155 Beaver Street, Milford, MA 01757 USA
 d3e3e3@gmail.com