Cisco Security Advisory – A vulnerability in the handling of IP sockets can cause devices to be vulnerable to a denial of service attack when any of several features of Cisco IOS Software are enabled.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/76067/cisco-sa-20090325-ip.txt
Source: https://packetstormsecurity.com/files/76067/Cisco-Security-Advisory-20090325-ip.html