USN-616-1: X.org vulnerabilities

13 June 2008

xorg-server vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 8.04 LTS
  • Ubuntu 7.10
  • Ubuntu 7.04
  • Ubuntu 6.06 LTS

Software Description

  • xorg-server

Details

Multiple flaws were found in the RENDER, RECORD, and Security extensions of X.org which did not correctly validate function arguments. An authenticated attacker could send specially crafted requests and gain root privileges or crash X. (CVE-2008-1377, CVE-2008-2360, CVE-2008-2361, CVE-2008-2362)

It was discovered that the MIT-SHM extension of X.org did not correctly validate the location of memory during an image copy. An authenticated attacker could exploit this to read arbitrary memory locations within X, exposing sensitive information. (CVE-2008-1379)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 8.04 LTS
xserver-xorg-core - 2:1.4.1~git20080131-1ubuntu9.2
Ubuntu 7.10
xserver-xorg-core - 2:1.3.0.0.dfsg-12ubuntu8.4
Ubuntu 7.04
xserver-xorg-core - 2:1.2.0-3ubuntu8.4
Ubuntu 6.06 LTS
xserver-xorg-core - 1:1.0.2-0ubuntu10.13

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system upgrade you need to restart your session to effect the necessary changes.

References