USN-221-1: racoon vulnerability

1 December 2005

ipsec-tools vulnerability

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

  • Ubuntu 5.10
  • Ubuntu 5.04
  • Ubuntu 4.10

Software Description


The Oulu University Secure Programming Group discovered a remote Denial of Service vulnerability in the racoon daemon. When the daemon is configured to use aggressive mode, then it did not check whether the peer sent all required payloads during the IKE negotiation phase. A malicious IPsec peer could exploit this to crash the racoon daemon.

Please be aware that racoon is not officially supported by Ubuntu, the package is in the ‘universe’ component of the archive.

Update instructions

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

Ubuntu 5.10
Ubuntu 5.04
Ubuntu 4.10

To update your system, please follow these instructions: