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Gentoo Linux Security Advisory                           GLSA 200506-23
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                                            https://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
        
Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

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

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
https://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.

https://creativecommons.org/licenses/by-sa/2.0/