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Gentoo Linux Security Advisory                           GLSA 200409-12
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                                            https://security.gentoo.org/
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  Severity: Normal
     Title: ImageMagick, imlib, imlib2: BMP decoding buffer overflows
      Date: September 08, 2004
      Bugs: #62309, #62487
        ID: 200409-12

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Synopsis
=======
ImageMagick, imlib and imlib2 contain exploitable buffer overflow
vulnerabilities in the BMP image processing code.

Background
=========
ImageMagick is a suite of image manipulation utilities and libraries
used for a wide variety of image formats. imlib is a general image
loading and rendering library.

Affected packages
================
    -------------------------------------------------------------------
     Package                /   Vulnerable   /              Unaffected
    -------------------------------------------------------------------
  1  media-gfx/imagemagick       < 6.0.7.1                  >= 6.0.7.1
  2  media-libs/imlib           < 1.9.14-r2               >= 1.9.14-r2
  3  media-libs/imlib2            < 1.1.2                     >= 1.1.2
    -------------------------------------------------------------------
     3 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

Description
==========
Due to improper bounds checking, ImageMagick and imlib are vulnerable
to a buffer overflow when decoding runlength-encoded bitmaps. This bug
can be exploited using a specially-crafted BMP image and could
potentially allow remote code execution when this image is decoded by
the user.

Impact
=====
A specially-crafted runlength-encoded BMP could lead ImageMagick and
imlib to crash or potentially execute arbitrary code.

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

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

    # emerge sync

    # emerge -pv ">=media-gfx/imagemagick-6.0.7.1"
    # emerge ">=media-gfx/imagemagick-6.0.7.1"

All imlib users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=media-libs/imlib-1.9.14-r2"
    # emerge ">=media-libs/imlib-1.9.14-r2"

All imlib2 users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=media-libs/imlib2-1.1.2"
    # emerge ">=media-libs/imlib2-1.1.2"

References
=========
  [ 1 ] CAN-2004-0817
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0817
  [ 2 ] CAN-2004-0802
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0802
  [ 3 ] ImageMagick Mailing List

  [ 4 ] SecurityTracker #1011104
          [ 5 ] SecurityTracker #1011105
        
Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  https://security.gentoo.org/glsa/200409-12

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
https://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.

https://creativecommons.org/licenses/by-sa/1.0/

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