full-disclosure - [ GLSA 200608-13 ] ClamAV: Heap buffer overflow

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Date: Tue, 08 Aug 2006 16:01:42 +0200
From: Matthias Geerdsen <vorlon@...too.org>
To: gentoo-announce@...too.org
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
	security-alerts@...uxsecurity.com
Subject: [ GLSA 200608-13 ] ClamAV: Heap buffer overflow

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Gentoo Linux Security Advisory                           GLSA 200608-13
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                                            http://security.gentoo.org/
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  Severity: High
     Title: ClamAV: Heap buffer overflow
      Date: August 08, 2006
      Bugs: #143093
        ID: 200608-13

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Synopsis
========

ClamAV is vulnerable to a heap-based buffer overflow resulting in a
Denial of Service and potentially remote execution of arbitrary code.

Background
==========

ClamAV is a GPL virus scanner.

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

    -------------------------------------------------------------------
     Package               /  Vulnerable  /                 Unaffected
    -------------------------------------------------------------------
  1  app-antivirus/clamav      < 0.88.4                      >= 0.88.4

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

Damian Put has discovered a boundary error in the pefromupx() function
used by the UPX extraction module, which unpacks PE Windows executable
files. Both the "clamscan" command-line utility and the "clamd" daemon
are affected.

Impact
======

By sending a malicious attachment to a mail server running ClamAV, a
remote attacker can cause a Denial of Service and potentially the
execution of arbitrary code with the permissions of the user running
ClamAV.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All ClamAV users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-antivirus/clamav-0.88.4"

References
==========

  [ 1 ] ClamAV security advisory
        http://www.clamav.net/security/0.88.4.html

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

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

  http://security.gentoo.org/glsa/glsa-200608-13.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@...too.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2006 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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