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Gentoo Linux Security Advisory                           GLSA 200608-17
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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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