Technical Cyber Security Alert TA04-111B – There is a vulnerability in Cisco’s Internetwork Operating System (IOS) SNMP service. When vulnerable Cisco routers or switches process specific SNMP requests, the system may reboot. If repeatedly exploited, this vulnerability could result in a sustained denial of service (DoS).
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/33144/TA04-111B.txt
Source: https://packetstormsecurity.com/files/33144/Technical-Cyber-Security-Alert-2004-111B.html