A race condition has been discovered in the file permission handling of the /proc file system. A local attacker could exploit this to execute arbitrary code with full root privileges.
The problem can be corrected by updating your system to the following package versions:
18 July 2006
A security issue affects these releases of Ubuntu and its derivatives:
A race condition has been discovered in the file permission handling of the /proc file system. A local attacker could exploit this 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.
After a standard system upgrade you need to reboot your computer to effect the necessary changes.
This flaw affects Ubuntu 5.04 and Ubuntu 5.10 as well; these releases will be fixed shortly in a followup advisory.