full-disclosure - [ GLSA 200409-28 ] GTK+ 2, gdk-pixbuf: Multiple image decoding vulnerabilities

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From: koon at gentoo.org (Thierry Carrez)
Subject: [ GLSA 200409-28 ] GTK+ 2, gdk-pixbuf: Multiple image decoding vulnerabilities

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Gentoo Linux Security Advisory                           GLSA 200409-28
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: GTK+ 2, gdk-pixbuf: Multiple image decoding vulnerabilities
      Date: September 21, 2004
      Bugs: #64230
        ID: 200409-28

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Synopsis
========

The GdkPixbuf library, which is also included in GTK+ 2, contains
several vulnerabilities that could lead to a Denial of Service or the
execution of arbitrary code.

Background
==========

GTK+ (GIMP Toolkit +) is a toolkit for creating graphical user
interfaces. The GdkPixbuf library provides facilities for image
handling. It is available as a standalone library as well as shipped
with GTK+ 2.

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

    -------------------------------------------------------------------
     Package                /   Vulnerable   /              Unaffected
    -------------------------------------------------------------------
  1  x11-libs/gtk+              < 2.4.9-r1                 >= 2.4.9-r1
                                                               < 2.0.0
  2  media-libs/gdk-pixbuf      < 0.22.0-r3               >= 0.22.0-r3
    -------------------------------------------------------------------
     2 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

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

A vulnerability has been discovered in the BMP image preprocessor
(CAN-2004-0753). Furthermore, Chris Evans found a possible integer
overflow in the pixbuf_create_from_xpm() function, resulting in a heap
overflow (CAN-2004-0782). He also found a potential stack-based buffer
overflow in the xpm_extract_color() function (CAN-2004-0783). A
possible integer overflow has also been found in the ICO decoder.

Impact
======

With a specially crafted BMP image an attacker could cause an affected
application to enter an infinite loop when that image is being
processed. Also, by making use of specially crafted XPM or ICO images
an attacker could trigger the overflows, which potentially allows the
execution of arbitrary code.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All GTK+ 2 users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=x11-libs/gtk+-2.4.9-r1"
    # emerge ">=x11-libs/gtk+-2.4.9-r1"

All GdkPixbuf users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=media-libs/gdk-pixbuf-0.22.0-r3"
    # emerge ">=media-libs/gdk-pixbuf-0.22.0-r3"

References
==========

  [ 1 ] CAN-2004-0753
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0753
  [ 2 ] CAN-2004-0782
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0782
  [ 3 ] CAN-2004-0783
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0783
  [ 4 ] CAN-2004-0788
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0788
  [ 5 ] GNOME Bug 150601
        http://bugzilla.gnome.org/show_bug.cgi?id=150601

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

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

  http://security.gentoo.org/glsa/glsa-200409-28.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@...too.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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