Unknown vulnerability in Cisco Firewall Services Module (FWSM) 2.3.1 and earlier, when using URL, FTP, or HTTPS filtering exceptions, allows certain TCP packets to bypass access control lists (ACLs).Referenceshttp://www.cisco.com/warp/public/707/cisco-sa-20050511-url.shtmlhttp://www.vupen.com/english/advisories/2005/0527
