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                                  CERT-Renater

                       Note d'Information No. 2005/VULN179
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DATE                      : 14/03/2005

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems using libexif versions prior to 0.5.12-r1.

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Gentoo Linux Security Advisory                           GLSA 200503-17
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                                             http://security.gentoo.org/
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   Severity: Normal
      Title: libexif: Buffer overflow vulnerability
       Date: March 12, 2005
       Bugs: #84076
         ID: 200503-17

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Synopsis
========

libexif fails to validate certain inputs, making it vulnerable to
buffer overflows.

Background
==========

libexif is a library for parsing, editing and saving EXIF data.

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

     -------------------------------------------------------------------
      Package             /   Vulnerable   /                 Unaffected
     -------------------------------------------------------------------
   1  media-libs/libexif      < 0.5.12-r1                  >= 0.5.12-r1

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

libexif contains a buffer overflow vulnerability in the EXIF tag
validation code. When opening an image with a specially crafted EXIF
tag, the lack of validation can cause applications linked to libexif to
crash.

Impact
======

A specially crafted EXIF file could crash applications making use of
libexif, potentially allowing the execution of arbitrary code with the
privileges of the user running the application.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libexif users should upgrade to the latest version:

     # emerge --sync
     # emerge --ask --oneshot --verbose ">=media-libs/libexif-0.5.12-r1"

References
==========

   [ 1 ] CAN-2005-0664
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0664

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

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

   http://security.gentoo.org/glsa/glsa-200503-17.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 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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