A new security update has been released for Gentoo Linux - ClamAV: Multiple vulnerabilities. Here the announcement:

Gentoo Linux Security Advisory GLSA 200712-20
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http://security.gentoo.org/
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Severity: High
Title: ClamAV: Multiple vulnerabilities
Date: December 29, 2007
Bugs: #202762
ID: 200712-20

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Synopsis
========

Multiple vulnerabilities have been discovered in ClamAV allowing remote
execution of arbitrary code and Denial of Service attacks.

Background
==========

Clam AntiVirus is a free anti-virus toolkit for UNIX, designed
especially for e-mail scanning on mail gateways.

Affected packages
=================

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Package / Vulnerable / Unaffected
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1 app-antivirus/clamav < 0.91.2-r1 >= 0.91.2-r1

Description
===========

iDefense reported an integer overflow vulnerability in the cli_scanpe()
function when parsing Portable Executable (PE) files packed in the MEW
format, that could be exploited to cause a heap-based buffer overflow
(CVE-2007-6335). Toeroek Edwin reported an off-by-one error when
decompressing MS-ZIP compressed CAB files (CVE-2007-6336). An
unspecified vulnerability related to the bzip2 decompression algorithm
has also been discovered (CVE-2007-6337).

Impact
======

A remote attacker could entice a user or automated system to scan a
specially crafted file, possibly leading to the execution of arbitrary
code with the privileges of the user running ClamAV (either a system
user or the "clamav" user if clamd is compromised).

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All ClamAV users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot -v ">=app-antivirus/clamav-0.91.2-r1"

References
==========

[ 1 ] CVE-2007-6335
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6335
[ 2 ] CVE-2007-6336
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6336
[ 3 ] CVE-2007-6337
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6337

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200712-20.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2007 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5