From: Robert Buchholz (rbugentoo.org)
Date: Sat Dec 29 2007 - 10:12:29 CST

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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
=================

    -------------------------------------------------------------------
     Package / Vulnerable / Unaffected
    -------------------------------------------------------------------
  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
securitygentoo.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

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