Cisco Security Advisory – A vulnerability exists in the Cisco Firewall Services Module (FWSM) that may result in a reload of the FWSM. The only affected FWSM System Software Version is 3.2(3).
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/61953/cisco-sa-20071219-fwsm.txt
Source: https://packetstormsecurity.com/files/61953/Cisco-Security-Advisory-20071219-fwsm.html