(Gentoo Issues Fix for GTK+ 2) gdk-pixbug BMP, ICO, and XPM Image Processing Errors May Let Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1011380
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SecurityTracker URL: http://securitytracker.com/id?1011380
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CVE Reference: CAN-2004-0753
(Links to External Site)
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Date: Sep 22 2004
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Impact: Denial of service via network, Execution of arbitrary code via network, User access via network
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Fix Available: Yes
Vendor Confirmed: Yes
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Version(s): prior to 2.4.9-r1
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Description: Several vulnerabilities were reported in gdk-pixbug. A remote user can create a specially crafted image file that, when processed
by an application using gdk-pixbug, will cause the application to crash or potentially execute arbitrary code. GTK+ 2 is also affected.
Mandrake and Red Hat reported that a remote user can create a specially crafted BMP image file that will cause gdk-pixbug to enter
an infinite loop [CVE: CAN-2004-0753].
It is also reported that Chris Evans discovered several overflows. A heap-based overflow
and a stack-based overflow reside in the xpm loader [CVE: CAN-2004-0782, CAN-2004-0783]. An integer overflow resides in the ico
loader [CVE: CAN-2004-0788]. A remote user may be able to trigger the overflows to cause an application that uses gdk-pixbug to
crash or possibly execute arbitrary code.
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Impact: A remote user may be able to cause an application using gdk-pixbug to crash or potentially execute arbitrary code with the privileges of the application.
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Solution: Gentoo has released a fix for GTK+ 2, which is affected by this vulnerability.
Gentoo indicates that 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"
Gentoo
indicates that 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"
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Vendor URL: www.gtk.org/ (Links to External Site)
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Cause: Boundary error, State error
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Underlying OS: Linux (Gentoo)
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Reported By: Thierry Carrez <koon@gentoo.org>
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Tue, 21 Sep 2004 22:51:36 +0200
From: Thierry Carrez <koon@gentoo.org>
Subject: [gentoo-announce] [ 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@gentoo.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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