Cisco Security Advisory – Cisco IOS Software contains a vulnerability in multiple features that could allow an attacker to cause a denial of service (DoS) condition on the affected device. A sequence of specially crafted TCP packets can cause the vulnerable device to reload.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/76064/cisco-sa-20090325-tcp.txt
Source: https://packetstormsecurity.com/files/76064/Cisco-Security-Advisory-20090325-tcp.html