Cisco CallManager 3.2 and earlier, 3.3 before 3.3(5)SR1, 4.0 before 4.0(2a)SR2c, and 4.1 before 4.1(3)SR2 allow remote attackers to (1) cause a denial of service (CPU and memory consumption) via a large number of open TCP connections to port 2000 and (2) cause a denial of service (fill the Windows Service Manager communication queue) via a large number of TCP connections to port 2001, 2002, or 7727.
secunia.com/advisories/18494
securityreason.com/securityalert/359
securitytracker.com/id?1015503
www.cisco.com/warp/public/707/cisco-sa-20060118-ccmdos.shtml
www.osvdb.org/22622
www.osvdb.org/22623
www.securityfocus.com/bid/16295
www.vupen.com/english/advisories/2006/0249
exchange.xforce.ibmcloud.com/vulnerabilities/24180