GLSA 200409-28: GTK+ 2, gdk-pixbuf: Multiple image decoding vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	GTK+ 2, gdk-pixbuf: Multiple image decoding vulnerabilities
Date:	09/21/2004
Bugs:	#64230
ID:	200409-28

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	Architecture(s)
x11-libs/gtk+	< 2.4.9-r1	>= 2.4.9-r1	All supported architectures
media-libs/gdk-pixbuf	< 0.22.0-r3	>= 0.22.0-r3	All 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

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 https://bugs.gentoo.org.