1. Gentoo Linux Security Advisory
| Advisory Reference | GLSA 200710-16 / X.Org |
| Release Date | October 14, 2007 |
| Latest Revision | October 14, 2007: 01 |
| Impact | high |
| Exploitable | local |
| Package | Vulnerable versions | Unaffected versions | Architecture(s) |
| x11-base/xorg-server | < 1.3.0.0-r1 | >= 1.3.0.0-r1 | All supported architectures |
Related bugreports: #191964
A vulnerability has been discovered in the Composite extension of the X.Org X server, allowing for a local privilege escalation.
The X Window System is a graphical windowing system based on a client/server model.
Aaron Plattner discovered a buffer overflow in the compNewPixmap() function when copying data from a large pixel depth pixmap into a smaller pixel depth pixmap.
A local attacker could execute arbitrary code with the privileges of the user running the X server, typically root.
Disable the Composite extension by setting ' Option "Composite" "disable" ' in the Extensions section of xorg.conf.
Note: This could affect the functionality of some applications.
All X.Org X server users should upgrade to the latest version:
Code Listing 3.1: Resolution |
# emerge --sync # emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.3.0.0-r1" |