The X.Org X wrapper (xserver-wrapper.c) in Debian GNU/Linux and Ubuntu Linux does not properly verify the TTY of a user who is starting X, which allows local users to bypass intended access restrictions by associating stdin with a file that is misinterpreted as the console TTY.
Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.
Link | Tags |
---|---|
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=652249 | vendor advisory |
http://www.ubuntu.com/usn/USN-1349-1 | vendor advisory |
http://www.debian.org/security/2011/dsa-2364 | vendor advisory |