full-disclosure - Xorg file permission change PoC (CVE-2011-4029)

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Message-ID: <20111027154844.GA24455@devzero.fr>
Date: Thu, 27 Oct 2011 17:48:44 +0200
From: vladz <vladz@...zero.fr>
To: full-disclosure@...ts.grok.org.uk
Subject: Xorg file permission change PoC (CVE-2011-4029)

Hi list,

A couple of weeks ago, I found a permission change vulnerability in 
the way that Xorg handled its lock files.  Once exploited, it allowed a
local user to modify the file permissions of an arbitrary file to 444 (read
for all).

It has been assigned CVE-2011-4029, X.org released a patch on 2011/10/18,
and now, I though I could share the vulnerability description and its
original PoC.

  http://vladz.devzero.fr/Xorg-CVE-2011-4029.txt

-- 
http://vladz.devzero.fr
PGP key 8F7E2D3C from pgp.mit.edu

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