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Date: Wed, 18 Apr 2012 12:28:11 -0700
From: Kees Cook <>
Subject: CVE request: Xorg input device format string flaw


Adding an input device with a malicious name can trigger a format
string flaw in Xorg's logging subsystem. For builds of Xorg lacking
-D_FORTIFY_SOURCE=2 (or 32-bit systems lacking the fix to fortify[1])
this can lead to arbitrary code execution as the Xorg user, usually
root. When built with fortify, this is a denial of service, since Xorg
will abort.

Proposed solution patch series can be found here:



Kees Cook
Chrome OS Security

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