For my part, if it isn't clear what to do with these (set the never-index
bit when making a request where the entity causing the request is a 3rd
party as a stronger defense against CRIME-like attacks), then it really
should be better documented.
I'd be happy to see this recommendation added to either the HTTP2 or HPACK
document and/or discussed more.
-=R
On Thu, Jan 22, 2015 at 7:42 AM, Barry Leiba <barryleiba@computer.org>
wrote:
> > David Black, part of the combined OPS/GEN-ART review
> > (http://www.ietf.org/mail-archive/web/gen-art/current/msg11197.html)
> > mentions:
> >
> > The second major issue looks serious - one of the major motivations
> > for HPACK is to mitigate attacks on DEFLATE (e.g., CRIME) via use of
> > never
> > indexed fields wrt compression. The absence of a list of header fields
> > that MUST use that never indexed functionality appears to be a serious
> > oversight.
> >
> > Could I ask one of you to place a Discuss to ensure that these concerns
> > are addressed?
> >
> > ====================
> > I haven't had the time to read the draft (shocking I know). So I'm
> > unclear at this point if the feedback is DISCUSS/COMMENT-worthy, but ...
> > I've got a very high respect for David's technical reviews. In many years
> > of review, it's the first time he directly asked me to file a DISCUSS. So
> > I want to go to the bottom of this issue. If this approach is clumsy
> > (yes, I know, the DISCUSS should be in my name, not on behalf of David),
> > I could also "DEFER" this draft.
> > I also see that the authors/David engaged in the discussion on the
> > ietf@ietf.org list. Good.
>
> For what it's worth, BenoƮt, I'm perfectly happy with your DISCUSS for
> this, even though it's kind of on the edge of the defined process.
> Making sure the comment is address adequately is important, and we're
> doing the right thing.
>
> There was, in fact, discussion about this, and David did not agree
> with Martin's response. I'll note that both Stephen and Kathleen
> balloted Yes on this document, without mentioning the issue. On the
> other hand, as it wasn't copied to the IESG list, they might not have
> seen it raised. Let's talk about it with them on the call.
>
> Barry
>
>