Date: Tue, 26 Jun 2007 23:22:02 +0200
From: Raphael Marichez <falco@gentoo.org.>
To: gentoo-announce@gentoo.org
Subject: [ GLSA 200706-09 ] libexif: Buffer overflow
Message-ID: <20070626212202.GA12137@falco.falcal.net.>
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Gentoo Linux Security Advisory GLSA 200706-09
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http://security.gentoo.org/
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Severity: Normal
Title: libexif: Buffer overflow
Date: June 26, 2007
Bugs: #181922
ID: 200706-09
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Synopsis
========
libexif does not properly handle image EXIF information, possibly
allowing for the execution of arbitrary code.
Background
==========
libexif is a library for parsing, editing and saving EXIF metadata from
images.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 media-libs/libexif < 0.6.16 >= 0.6.16
Description
===========
iDefense Labs have discovered that the exif_data_load_data_entry()
function in libexif/exif-data.c improperly handles integer data while
working with an image with many EXIF components, allowing an integer
overflow possibly leading to a heap-based buffer overflow.
Impact
======
An attacker could entice a user of an application making use of a
vulnerable version of libexif to load a specially crafted image file,
possibly resulting in a crash of the application or the execution of
arbitrary code with the rights 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-0.6.16"
References
==========
[ 1 ] CVE-2006-4168
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4168
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200706-09.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 2007 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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