Ubuntu Security Notice USN-1585-1
26th September, 2012
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04
FreeRADIUS could be made to crash or run programs if it received specially crafted network traffic.
- freeradius - a high-performance and highly configurable RADIUS server
Timo Warns discovered that FreeRADIUS incorrectly handled certain long
timestamps in client certificates. A remote attacker could exploit this
flaw and cause the FreeRADIUS server to crash, resulting in a denial of
service, or possibly execute arbitrary code.
The default compiler options for affected releases should reduce the
vulnerability to a denial of service.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 12.04 LTS:
- freeradius 2.1.10+dfsg-3ubuntu0.12.04.1
- Ubuntu 11.10:
- freeradius 2.1.10+dfsg-3ubuntu0.11.10.1
- Ubuntu 11.04:
- freeradius 2.1.10+dfsg-2ubuntu2.1
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.