星球 - USN-1349-1: X.Org vulnerability

來自:Ubuntu security notices | 2012/1/27 8:55:05

Ubuntu Security Notice USN-1349-1


26th January, 2012


xorg vulnerability


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




  • Ubuntu 11.10


  • Ubuntu 11.04


  • Ubuntu 10.10


  • Ubuntu 10.04 LTS





Summary


X could be made to start by a user who lacked appropriate permissions.





Software description





  • xorg
    - X.Org X Window System













Details


It was discovered that the X wrapper incorrectly checked certain console
permissions when launched by unprivileged users. An attacker connected
remotely could use this flaw to start X, bypassing the console permissions
check.



Update instructions


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




Ubuntu 11.10:




xserver-xorg

1:7.6+7ubuntu7.1





Ubuntu 11.04:




xserver-xorg

1:7.6+4ubuntu3.2





Ubuntu 10.10:




xserver-xorg

1:7.5+6ubuntu3.1





Ubuntu 10.04 LTS:




xserver-xorg

1:7.5+5ubuntu1.1






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


In general, a standard system update will make all the necessary changes.





References




CVE-2011-4613