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Gentoo Linux Security Advisory                           GLSA 200411-08
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  Severity: Normal
     Title: GD: Integer overflow
      Date: November 03, 2004
      Bugs: #69070
        ID: 200411-08

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Synopsis
========

The PNG image decoding routines in the GD library contain an integer
overflow that may allow execution of arbitrary code with the rights of
the program decoding a malicious PNG image.

Background
==========

The GD graphics library is an open source library which allows
programmers to easily generate PNG, JPEG, GIF and WBMP images from many
different programming languages.

Affected packages
=================

    -------------------------------------------------------------------
     Package        /  Vulnerable  /                        Unaffected
    -------------------------------------------------------------------
  1  media-libs/gd      < 2.0.32                             >= 2.0.32

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

infamous41md found an integer overflow in the memory allocation
procedure of the GD routine that handles loading PNG image files.

Impact
======

A remote attacker could entice a user to load a carefully crafted PNG
image file in a GD-powered application, or send a PNG image to a web
application which uses GD PNG decoding functions. This could
potentially lead to execution of arbitrary code with the rights of the
program loading the image.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All GD users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/gd-2.0.32"

References
==========

  [ 1 ] Original BugTraq advisory
        http://www.securityfocus.com/archive/1/379382
  [ 2 ] CAN-2004-0990
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0990

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

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

  http://security.gentoo.org/glsa/glsa-200411-08.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 2004 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/1.0


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