[ GLSA 200506-23 ] Clam AntiVirus: Denial of Service vulnerability

[Sune Kloppenborg Jeppesen <jaervosz () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200506-23
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Clam AntiVirus: Denial of Service vulnerability
      Date: June 27, 2005
      Bugs: #96960
        ID: 200506-23

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Synopsis
========

Clam AntiVirus is vulnerable to a Denial of Service attack when
processing certain Quantum archives.

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      < 0.86.1                      >= 0.86.1

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

Andrew Toller and Stefan Kanthak discovered that a flaw in libmspack's
Quantum archive decompressor renders Clam AntiVirus vulnerable to a
Denial of Service attack.

Impact
======

A remote attacker could exploit this vulnerability to cause a Denial of
Service by sending a specially crafted Quantum archive to the server.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Clam AntiVirus users should upgrade to the latest available
version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-antivirus/clamav-0.86.1"

References
==========

  [ 1 ] Clam AntiVirus Release Notes
        http://sourceforge.net/project/shownotes.php?release_id=337279

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

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

  http://security.gentoo.org/glsa/glsa-200506-23.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 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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