USN-450-1: ipsec-tools vulnerability

Ubuntu Security Notice USN-450-1

9th April, 2007

ipsec-tools vulnerability

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

  • Ubuntu 6.10
  • Ubuntu 6.06 LTS
  • Ubuntu 5.10


A flaw was discovered in the IPSec key exchange server "racoon". Remote
attackers could send a specially crafted packet and disrupt established
IPSec tunnels, leading to a denial of service.

Update instructions

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

Ubuntu 6.10:
racoon 1:0.6.6-1ubuntu1.1
Ubuntu 6.06 LTS:
racoon 1:0.6.5-4ubuntu1.1
Ubuntu 5.10:
racoon 1:0.6-1ubuntu1.2

To update your system, please follow these instructions:

In general, a standard system upgrade is sufficient to effect the
necessary changes.