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Gentoo Linux Security Advisory                           GLSA 200802-01
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http://security.gentoo.org/ 
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  Severity: Normal
     Title: SDL_image: Two buffer overflow vulnerabilities
      Date: February 06, 2008
      Bugs: #207933
        ID: 200802-01

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Synopsis
=======
Two boundary errors have been identified in SDL_image allowing for the
remote execution of arbitrary code or the crash of the application
using the library.

Background
=========
SDL_image is an image file library that loads images as SDL surfaces,
and supports various formats like BMP, GIF, JPEG, LBM, PCX, PNG, PNM,
TGA, TIFF, XCF, XPM, and XV.

Affected packages
================
    -------------------------------------------------------------------
     Package               /  Vulnerable  /                 Unaffected
    -------------------------------------------------------------------
  1  media-libs/sdl-image     < 1.2.6-r1                   >= 1.2.6-r1

Description
==========
The LWZReadByte() function in file IMG_gif.c and the IMG_LoadLBM_RW()
function in file IMG_lbm.c each contain a boundary error that can be
triggered to cause a static buffer overflow and a heap-based buffer
overflow. The first boundary error comes from some old vulnerable GD
PHP code (CVE-2006-4484).

Impact
=====
A remote attacker can make an application using the SDL_image library
to process a specially crafted GIF file or IFF ILBM file that will
trigger a buffer overflow, resulting in the execution of arbitrary code
with the permissions of the application or the application crash.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All SDL_image users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/sdl-image-1.2.6-r1"

References
=========
  [ 1 ] SA28640
http://secunia.com/advisories/28640/ 
  [ 2 ] CVE-2007-6697
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6697 
  [ 3 ] CVE-2008-0544
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0544 

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

http://security.gentoo.org/glsa/glsa-200802-01.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 2008 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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