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Gentoo Linux Security Advisory                           GLSA 200909-04
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Clam AntiVirus: Multiple vulnerabilities
      Date: September 09, 2009
      Bugs: #264834, #265545
        ID: 200909-04

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Synopsis
========

Multiple vulnerabilities in ClamAV allow for the remote execution of
arbitrary code or Denial of Service.

Background
==========

Clam AntiVirus (short: ClamAV) is an anti-virus toolkit for UNIX,
designed especially for e-mail scanning on mail gateways.

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

    -------------------------------------------------------------------
     Package               /  Vulnerable  /                 Unaffected
    -------------------------------------------------------------------
  1  app-antivirus/clamav      < 0.95.2                      >= 0.95.2

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

Multiple vulnerabilities have been found in ClamAV:

* The vendor reported a Divide-by-zero error in the PE ("Portable
  Executable"; Windows .exe) file handling of ClamAV (CVE-2008-6680).

* Jeffrey Thomas Peckham found a flaw in libclamav/untar.c, possibly
  resulting in an infinite loop when processing TAR archives in clamd
  and clamscan (CVE-2009-1270).

* Martin Olsen reported a vulnerability in the CLI_ISCONTAINED macro
  in libclamav/others.h, when processing UPack archives
  (CVE-2009-1371).

* Nigel disclosed a stack-based buffer overflow in the
  "cli_url_canon()" function in libclamav/phishcheck.c when processing
  URLs (CVE-2009-1372).

Impact
======

A remote attacker could entice a user or automated system to process a
specially crafted UPack archive or a file containing a specially
crafted URL, possibly resulting in the remote execution of arbitrary
code with the privileges of the user running the application, or a
Denial of Service. Furthermore, a remote attacker could cause a Denial
of Service by supplying a specially crafted TAR archive or PE
executable to a Clam AntiVirus instance.

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-0.95.2

References
==========

  [ 1 ] CVE-2008-6680
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-6680
  [ 2 ] CVE-2009-1270
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1270
  [ 3 ] CVE-2009-1371
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1371
  [ 4 ] CVE-2009-1372
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1372

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

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

  http://security.gentoo.org/glsa/glsa-200909-04.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@g.o or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2009 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