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                                    CERT-Renater

                         Note d'Information No. 2007/VULN346
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DATE                      : 13/08/2007

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems running GD library.

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Gentoo Linux Security Advisory                           GLSA 200708-05
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                                             http://security.gentoo.org/
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   Severity: Normal
      Title: GD: Multiple vulnerabilities
       Date: August 09, 2007
       Bugs: #179154
         ID: 200708-05

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Synopsis
========

Multiple vulnerabilities have been discovered in GD, allowing for the
execution of arbitrary code.

Background
==========

GD is a graphic library for fast image creation.

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

     -------------------------------------------------------------------
      Package        /  Vulnerable  /                        Unaffected
     -------------------------------------------------------------------
   1  media-libs/gd      < 2.0.35                             >= 2.0.35

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

Xavier Roche discovered an infinite loop in the gdPngReadData()
function when processing a truncated PNG file (CVE-2007-2756). An
integer overflow has been discovered in the gdImageCreateTrueColor()
function (CVE-2007-3472). An error has been discovered in the function
gdImageCreateXbm() function (CVE-2007-3473). Unspecified
vulnerabilities have been discovered in the GIF reader (CVE-2007-3474).
An error has been discovered when processing a GIF image that has no
global color map (CVE-2007-3475). An array index error has been
discovered in the file gd_gif_in.c when processing images with an
invalid color index (CVE-2007-3476). An error has been discovered in
the imagearc() and imagefilledarc() functions when processing overly
large angle values (CVE-2007-3477). A race condition has been
discovered in the gdImageStringFTEx() function (CVE-2007-3478).

Impact
======

A remote attacker could exploit one of these vulnerabilities to cause a
Denial of Service or possibly execute arbitrary code with the
privileges of the user running GD.

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-2.0.35"

References
==========

   [ 1 ] CVE-2007-2756
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2756
   [ 2 ] CVE-2007-3472
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3472
   [ 3 ] CVE-2007-3473
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3473
   [ 4 ] CVE-2007-3474
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3474
   [ 5 ] CVE-2007-3475
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3475
   [ 6 ] CVE-2007-3476
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3476
   [ 7 ] CVE-2007-3477
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3477
   [ 8 ] CVE-2007-3478
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3478

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

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

   http://security.gentoo.org/glsa/glsa-200708-05.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 at 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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