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

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.

Affected packages

Package 	x11-libs/gtk+ on all architectures
Affected versions 	< 2.4.9-r1
Unaffected versions 	>= 2.4.9-r1
< 2.0.0
Package 	media-libs/gdk-pixbuf on all architectures
Affected versions 	< 0.22.0-r3
Unaffected versions 	>= 0.22.0-r3

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.

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

    CAN-2004-0753
    CAN-2004-0782
    CAN-2004-0783
    CAN-2004-0788
    GNOME Bug 150601