Otkrivena su i ispravljena dva sigurnosna propusta programske biblioteke gdk-pixbuf. Udaljeni napadač može iskoristiti spomenute nedostatke za izvođenje napada uskraćivanjem usluge (eng. Denial of Service attack, DoS).

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Gentoo Linux Security Advisory                           GLSA 201206-20
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: gdk-pixbuf: Denial of Service
     Date: June 23, 2012
     Bugs: #373999, #412033
       ID: 201206-20

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Synopsis
========

Multiple vulnerabilities in gdk-pixbuf may create a Denial of Service
condition.

Background
==========

gdk-pixbuf is an image loading library for GTK+.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  x11-libs/gdk-pixbuf        < 2.24.1-r1              >= 2.24.1-r1

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

Two vulnerabilities have been found in gdk-pixbuf:

* The "gdk_pixbuf__gif_image_load()" function in io-gif.c fails to
  properly handle certain return values from subroutines
  (CVE-2011-2485).
* The "read_bitmap_file_data()" function in io-xbm.c contains an
  integer overflow error (CVE-2012-2370).

Impact
======

A remote attacker could entice a user to open a specially crafted image
in an application linked against gdk-pixbuf, possibly resulting in
Denial of Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All gdk-pixbuf users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=x11-libs/gdk-pixbuf-2.24.1-r1"

Packages which depend on this library may need to be recompiled. Tools
such as revdep-rebuild may assist in identifying some of these
packages.

References
==========

[ 1 ] CVE-2011-2485
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2485
[ 2 ] CVE-2012-2370
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-2370

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

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

 http://security.gentoo.org/glsa/glsa-201206-20.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
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License
=======

Copyright 2012 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