The TCP implementation in Cisco Videoscape Distribution Suite for Internet Streaming (VDS-IS) 3.3(0) 3.3(1) 4.0(0) and 4.1(0) does not properly initiate new TCP sessions when a previous session is in a FIN wait state which allows remote attackers to cause a denial of service (TCP outage) via vectors involving FIN packets aka Bug ID CSCuy45136.