X.org, XFree86: Integer and stack overflows in libXpm

Background

XFree86 and X.org are both implementations of the X Window System.

Description

Chris Evans has discovered multiple integer and stack overflow vulnerabilities in the X Pixmap library, libXpm, which is a part of the X Window System. These overflows can be exploited by the execution of a malicious XPM file, which can crash applications that are dependent on libXpm.

Impact

A carefully-crafted XPM file could crash applications that are linked against libXpm, potentially allowing the execution of arbitrary code with the privileges of the user running the application.

Workaround

There is no known workaround at this time.

Resolution

All X.org users should upgrade to the latest version:

 # emerge sync
 
 # emerge -pv ">=x11-base/xorg-x11-6.7.0-r2"
 # emerge ">=x11-base/xorg-x11-6.7.0-r2"

All XFree86 users should upgrade to the latest version:

 # emerge sync
 
 # emerge -pv ">=x11-base/xfree-4.3.0-r7"
 # emerge ">=x11-base/xfree-4.3.0-r7"

Note: Usage of XFree86 is deprecated on the AMD64, HPPA, IA64, MIPS, PPC and SPARC architectures: XFree86 users on those architectures should switch to X.org rather than upgrading XFree86.