The network stack in Cisco TelePresence MCU Software before 4.3(2.30) allows remote attackers to cause a denial of service (memory consumption) via crafted TCP packets, aka Bug ID CSCtz35468.
http://www.securitytracker.com/id/1031054
http://tools.cisco.com/security/center/viewAlert.x?alertId=36016
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20141015-mcu