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Date: Thu, 6 Sep 2012 08:37:14 -0600
From: Vincent Danen <vdanen@...hat.com>
To: oss-security@...ts.openwall.com
Subject: CVE request - mcrypt buffer overflow flaw

I don't believe a CVE has been assigned to this, could one be?

A buffer overflow was reported [1],[2] in mcrypt version 2.6.8 and
earlier due to a boundary error in the processing of an encrypted file
(via the check_file_head() function in src/extra.c).  If a user were
tricked into attempting to decrypt a specially-crafted .nc encrypted
flie, this flaw would cause a stack-based buffer overflow that could
potentially lead to arbitrary code execution.

References:

https://bugzilla.redhat.com/show_bug.cgi?id=855029
https://secunia.com/advisories/50507/
https://bugs.gentoo.org/show_bug.cgi?id=434112
http://packetstormsecurity.org/files/116268/mcrypt-2.6.8-Buffer-Overflow-Proof-Of-Concept.html

-- 
Vincent Danen / Red Hat Security Response Team 

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