Cisco CatOS is susceptible to a TCP-ACK Denial of Service (DoS) attack on the Telnet, HTTP and SSH service. If exploited, the vulnerability causes the Cisco CatOS running device to stop functioning and reload. Releases affected: 8.xGLX earlier than 8.3(2)GLX, 8.x earlier than 8.2(2), 7.x earlier than 7.6(6), 6.x earlier than 6.4(9). and 5.x earlier than 5.5(20).
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/33524/cisco-sa-20040609-catos.txt
Source: https://packetstormsecurity.com/files/33524/Cisco-Security-Advisory-20040609-catos.html