A local privilege escalation vulnerability has been discovered in the pixmap allocation handling of the X server. By allocating a huge pixmap, a local user could trigger an integer overflow that resulted in a memory allocation that was too small for the requested pixmap. This resulted in a buffer overflow which could eventually be exploited to execute arbitrary code with full root privileges.
The problem can be corrected by updating your system to the following package versions:
12 September 2005
A security issue affects these releases of Ubuntu and its derivatives:
A local privilege escalation vulnerability has been discovered in the pixmap allocation handling of the X server. By allocating a huge pixmap, a local user could trigger an integer overflow that resulted in a memory allocation that was too small for the requested pixmap. This resulted in a buffer overflow which could eventually be exploited to execute arbitrary code with full root privileges.
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
Vulmon