1. Gentoo Linux Security Advisory
| Advisory Reference | GLSA 200701-25 / X.Org |
| Release Date | January 27, 2007 |
| Latest Revision | February 26, 2007: 02 |
| Impact | normal |
| Exploitable | local |
| Package | Vulnerable versions | Unaffected versions | Architecture(s) |
| x11-base/xorg-server | < 1.1.1-r4 | >= 1.1.1-r4 | All supported architectures |
Related bugreports: #157421
Sean Larsson from iDefense Labs has found multiple vulnerabilities in the DBE and Render extensions.
The X Window System is a graphical windowing system based on a client/server model.
Multiple memory corruption vulnerabilities have been found in the ProcDbeGetVisualInfo() and the ProcDbeSwapBuffers() of the DBE extension, and ProcRenderAddGlyphs() in the Render extension.
A local attacker could execute arbitrary code with the privileges of the user running the X server, typically root.
Disable the DBE extension by removing the "Load dbe" directive in the Module section of xorg.conf, and explicitly disable the Render extension with ' Option "RENDER" "disable" ' in the Extensions section.
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-1.1.1-r4" |