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Re: bohe and delta experimentation...

Willy Tarreau <w@1wt.eu> Fri, 18 January 2013 18:20 UTC

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Date: Fri, 18 Jan 2013 19:18:19 +0100
From: Willy Tarreau <w@1wt.eu>
To: Roberto Peon <grmocg@gmail.com>
Cc: RUELLAN Herve <Herve.Ruellan@crf.canon.fr>, Nico Williams <nico@cryptonector.com>, "Martin J. Dürst" <duerst@it.aoyama.ac.jp>, Mark Nottingham <mnot@mnot.net>, James M Snell <jasnell@gmail.com>, "ietf-http-wg@w3.org" <ietf-http-wg@w3.org>
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Subject: Re: bohe and delta experimentation...
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Hi Roberto,

On Fri, Jan 18, 2013 at 09:22:11AM -0800, Roberto Peon wrote:
> This makes URLs vulnerable to the CRIME attack, and URLs definitely do
> contain sensitive information often :(
> 
> This is true for anything which allows partial matches (I just can't figure
> out how date could be sensitive, but if it could, even the encoding
> suggested earlier by me would be dangerous).
> 
> I dropped exactly this (prefix match) functionality from delta early on
> because of this.

If we consider that anything is sensible to the CRIME attack, then we need
to go fully stateless I guess, otherwise it will be too hard to find out
what is safe to reuse and what is risky :-/

Willy

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