Cisco Unified Communications Manager (aka CUCM formerly CallManager) 4.x 5.x before 5.1(3g) 6.x before 6.1(4) 7.0 before 7.0(2) and 7.1 before 7.1(2); and Cisco Unified Presence 1.x 6.x before 6.0(6) and 7.x before 7.0(4); allows remote attackers to cause a denial of service (TCP services outage) via a large number of TCP connections related to \tracking of network connections \ aka Bug IDs CSCsq22534 and CSCsw52371.