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Gentoo Linux Security Advisory                           GLSA 200511-03
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  Severity: Normal
     Title: giflib: Multiple vulnerabilities
      Date: November 04, 2005
      Bugs: #109997
        ID: 200511-03

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Synopsis
========

giflib may dereference NULL or write out of bounds when processing
malformed images, potentially resulting in Denial of Service or
arbitrary code execution.

Background
==========

giflib is a library for reading and writing GIF images.

Affected packages
=================

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  media-libs/giflib       < 4.1.4                          >= 4.1.4

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

Chris Evans and Daniel Eisenbud independently discovered two
out-of-bounds memory write operations and a NULL pointer dereference in
giflib.

Impact
======

An attacker could craft a malicious GIF image and entice users to load
it using an application making use of the giflib library, resulting in
an application crash or potentially the execution of arbitrary code.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All giflib users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/giflib-4.1.4"

References
==========

  [ 1 ] CVE-2005-2974
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2974
  [ 2 ] CVE-2005-3350
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3350

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

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

  http://security.gentoo.org/glsa/glsa-200511-03.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 2005 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/2.0


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