[ GLSA 200706-01 ] libexif: Integer overflow vulnerability

[Raphael Marichez <falco () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200706-01
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: libexif: Integer overflow vulnerability
      Date: June 05, 2007
      Bugs: #178081
        ID: 200706-01

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Synopsis
========

libexif fails to handle Exif (EXchangeable Image File) data inputs,
making it vulnerable to an integer overflow.

Background
==========

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

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

    -------------------------------------------------------------------
     Package             /  Vulnerable  /                   Unaffected
    -------------------------------------------------------------------
  1  media-libs/libexif      < 0.6.15                        >= 0.6.15

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

Victor Stinner reported an integer overflow in the
exif_data_load_data_entry() function from file exif-data.c while
handling Exif data.

Impact
======

An attacker could entice a user to process a file with specially
crafted Exif extensions with an application making use of libexif,
which will trigger the integer overflow and potentially execute
arbitrary code or crash the application.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libexif users should upgrade to the latest version. Please note
that users upgrading from "<=media-libs/libexif-0.6.13" should also run
revdep-rebuild after their upgrade.

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/libexif-0.6.15"
    # revdep-rebuild --library=/usr/lib/libexif.so

References
==========

  [ 1 ] CVE-2007-2645
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2645

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

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

  http://security.gentoo.org/glsa/glsa-200706-01.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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