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                                  CERT-Renater

                       Note d'Information No. 2005/VULN459
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DATE                      : 27/07/2005

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems running Clamav.

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Gentoo Linux Security Advisory                           GLSA 200507-25
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                                             http://security.gentoo.org/
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   Severity: High
      Title: Clam AntiVirus: Integer overflows
       Date: July 26, 2005
       Bugs: #100178
         ID: 200507-25

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Synopsis
========

Clam AntiVirus is vulnerable to integer overflows when handling several
file formats, potentially resulting in the execution of arbitrary code.

Background
==========

Clam AntiVirus is a GPL anti-virus toolkit, designed for integration
with mail servers to perform attachment scanning. Clam AntiVirus also
provides a command line scanner and a tool for fetching updates of the
virus database.

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

     -------------------------------------------------------------------
      Package               /  Vulnerable  /                 Unaffected
     -------------------------------------------------------------------
   1  app-antivirus/clamav      < 0.86.2                      >= 0.86.2

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

Neel Mehta and Alex Wheeler discovered that Clam AntiVirus is
vulnerable to integer overflows when handling the TNEF, CHM and FSG
file formats.

Impact
======

By sending a specially-crafted file an attacker could execute arbitrary
code with the permissions of the user running Clam AntiVirus.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Clam AntiVirus users should upgrade to the latest version:

     # emerge --sync
     # emerge --ask --oneshot --verbose ">=app-antivirus/clamav-0.86.2"

References
==========

   [ 1 ] BugTraq Announcement
         http://www.securityfocus.com/archive/1/406377/30/
   [ 2 ] Clam AntiVirus: Release Notes
         http://sourceforge.net/project/shownotes.php?release_id=344514

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

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

   http://security.gentoo.org/glsa/glsa-200507-25.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 at gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2005 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/2.0
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