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Date: Thu, 25 Sep 2014 12:53:35 -0700
From: Michal Zalewski <>
Cc: Tavis Ormandy <>, Chester Ramey <>, 
	Solar Designer <>
Subject: Re: CVE-2014-6271: remote code execution through bash

> Yeah, that general approach is probably the best.  I was just wondering.
> I don't really see the need to use a prefix and a suffix, though.

Prefix is definitely more valuable, because specific prefixes are
enforced by Apache and its ilk, but the suffix for the HTTP header ->
shell variable propagation is within attacker's control.


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