[ GLSA 200909-04 ] Clam AntiVirus: Multiple vulnerabilities

[Alex Legler <a3li () gentoo org>]

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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 () gentoo org 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

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