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Gentoo Linux Security Advisory                           GLSA 200811-04
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Graphviz: User-assisted execution of arbitrary code
      Date: November 09, 2008
      Bugs: #240636
        ID: 200811-04

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Synopsis
========

A buffer overflow in Graphviz might lead to user-assisted execution of
arbitrary code via a DOT file.

Background
==========

Graphviz is an open source graph visualization software.

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

    -------------------------------------------------------------------
     Package             /  Vulnerable  /                   Unaffected
    -------------------------------------------------------------------
  1  media-gfx/graphviz      < 2.20.3                        >= 2.20.3

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

Roee Hay reported a stack-based buffer overflow in the push_subg()
function in parser.y when processing a DOT file with a large number of
Agraph_t elements.

Impact
======

A remote attacker could entice a user or automated system to open a
specially crafted DOT file in an application using Graphviz, possibly
leading to the execution of arbitrary code.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Graphviz users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-gfx/graphviz-2.20.3"

References
==========

  [ 1 ] CVE-2008-4555
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4555

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

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

  http://security.gentoo.org/glsa/glsa-200811-04.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
http://bugs.gentoo.org.

License
=======

Copyright 2008 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