Cisco Security Advisory – Multiple Cisco products contain vulnerabilities in the processing of IPSec IKE (Internet Key Exchange) messages. These vulnerabilities were identified by the University of Oulu Secure Programming Group (OUSPG) PROTOS Test Suite for IPSec and can be repeatedly exploited to produce a denial of service.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/41542/cisco-sa-20051114-ipsec.txt
Source: https://packetstormsecurity.com/files/41542/Cisco-Security-Advisory-20051114-ipsec.html