CVE-2006-0179
The Cisco IP Phone 7940 allows remote attackers to cause a denial of service (reboot) via a large amount of TCP SYN packets (syn flood) to arbitrary ports, as demonstrated to port 80.
Date published : 2006-01-11
http://www.securityfocus.com/bid/16200
http://www.cisco.com/warp/public/707/cisco-response-20060113-ip-phones.shtml