[ GLSA 200608-17 ] libwmf: Buffer overflow vulnerability

[Sune Kloppenborg Jeppesen <jaervosz () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200608-17
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: libwmf: Buffer overflow vulnerability
      Date: August 10, 2006
      Bugs: #139325
        ID: 200608-17

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Synopsis
========

libwmf is vulnerable to an integer overflow potentially resulting in
the execution of arbitrary code.

Background
==========

libwmf is a library for reading and converting vector images in
Microsoft's native Windows Metafile Format (WMF).

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

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  media-libs/libwmf      < 0.2.8.4                       >= 0.2.8.4

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

infamous41md discovered that libwmf fails to do proper bounds checking
on the MaxRecordSize variable in the WMF file header. This could lead
to an head-based buffer overflow.

Impact
======

By enticing a user to open a specially crafted WMF file, a remote
attacker could cause a heap-based buffer overflow and execute arbitrary
code with the permissions of the user running the application that uses
libwmf.

Workaround
==========

There is no known workaround for this issue.

Resolution
==========

All libwmf users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/libwmf-0.2.8.4"

References
==========

  [ 1 ] CVE-2006-3376
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3376

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

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

  http://security.gentoo.org/glsa/glsa-200608-17.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 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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