GTK+ 2, GdkPixbuf: Multiple XPM decoding vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200511-14 / gtk+
Release Date	November 16, 2005
Latest Revision	November 16, 2005: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
x11-libs/gtk+	< 2.8.6-r1	>= 2.8.6-r1, revision >= 2.6.10-r1, < 2.0	All supported architectures
media-libs/gdk-pixbuf	< 0.22.0-r5	>= 0.22.0-r5	All supported architectures

Related bugreports: #112608

Synopsis

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

2. Impact Information

Background

GTK+ (the 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 and also packaged with GTK+ 2.

Description

iDEFENSE reported a possible heap overflow in the XPM loader (CVE-2005-3186). Upon further inspection, Ludwig Nussel discovered two additional issues in the XPM processing functions : an integer overflow (CVE-2005-2976) that affects only gdk-pixbuf, and an infinite loop (CVE-2005-2975).

Impact

Using a specially crafted XPM image an attacker could cause an affected application to enter an infinite loop or trigger the overflows, potentially allowing the execution of arbitrary code.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

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

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose x11-libs/gtk+

All GdkPixbuf users should upgrade to the latest version:

Code Listing 3.2: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-libs/gdk-pixbuf-0.22.0-r5"

4. References

Page updated November 16, 2005

Summary: This is a Gentoo Linux Security Advisory

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