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Ubuntu Security Notice USN-1585-1
September 26, 2012

freeradius vulnerability
============================================================================

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

- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 11.04

Summary:

FreeRADIUS could be made to crash or run programs if it received
specially crafted network traffic.

Software Description:
- freeradius: a high-performance and highly configurable RADIUS server

Details:

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.

Update instructions:

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

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

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

References:
  http://www.ubuntu.com/usn/usn-1585-1
  CVE-2012-3547

Package Information:

https://launchpad.net/ubuntu/+source/freeradius/2.1.10+dfsg-3ubuntu0.12.04.1

https://launchpad.net/ubuntu/+source/freeradius/2.1.10+dfsg-3ubuntu0.11.10.1
  https://launchpad.net/ubuntu/+source/freeradius/2.1.10+dfsg-2ubuntu2.1