Rule:  --Sid:2225--Summary:This event is generated when an attempt is made to access gozila.cgi on an internal web server. This may indicate an attempt to exploit a denial of service vulnerability in the Linksys Etherfast BEFSR41 Cable/DSL Router web interface.--Impact:Denial of service.--Detailed Information:The Linksys Etherfast BEFSR41 Cable/DSL router web interface, Gozila.cgi, contains a denial of service vulnerability where, if a request is made for gozila.cgi is made without any arguments, the router crashes.--Affected Systems:Linksys Etherfast BEFSR41 Cable/DSL routers running firmware version 1.42.7 or earlier.--Attack Scenarios:An attacker sends http://routerhostname/gozilla.cgi? to a vulnerable router (where routerhostname is the router's host name). The router will crash. --Ease of Attack:Simple.--False Positives:If a legitimate remote user accesses gozila.cgi, this rule may generate an event.--False Negatives:None known.--Corrective Action:Upgrade your router firmware to 1.43 or higher.--Contributors:Sourcefire Research TeamBrian Caswell <bmc@sourcefire.com>Nigel Houghton <nigel.houghton@sourcefire.com>Sourcefire Technical Publications TeamJennifer Harvey <jennifer.harvey@sourcefire.com>-- Additional References:Bugtraqhttp://www.securityfocus.com/bid/6086CVEhttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1236--