Rule:--Sid:1388--Summary:This event is generated when a remote user attempts to send a NOTIFY directive with an overly long Location URL to an internal host's Universal Plug and Play (UPnP) server.--Impact:Attempted administrator access.  A successful attack may cause a denial of service or permit the execution of arbitrary code with administrator privileges.--Detailed Information:The UPnP is used to find network-based devices.  Specifically, UPnP NOTIFY directives are employed to advertise the existence of UPnP devices on the network.  A vulnerability exists that permits a malformed NOTIFY directive with an overly long Location URL to cause a buffer overflow on the remote host listening on UPnP.  The buffer overflow attack may permit the execution of arbitrary code on the host with administrator privileges.--Affected Systems:Microsoft Windows 98, 98SE, ME, XP--Attack Scenarios:An attacker may obtain craft a malformed NOTIFY directive to execute arbitrary code on the victim host.--Ease of Attack:Simple. Exploit code is freely available.--False Positives:This event will be generated if external hosts are permitted to query for UPnP devices.--False Negatives:None Known.--Corrective Action:Block inbound UPnP traffic.--Contributors:Original rule writer unknown.Modified by Brian Caswell <bmc@sourcefire.com>Sourcefire Research TeamJudy Novak <judy.novak@sourcefire.com>--Additional References:CVE:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2001-0876--