Cisco IOS 15.2(4)M4 on Cisco Unified Border Element (CUBE) devices allows remote attackers to cause a denial of service (input-queue consumption and traffic-processing outage) via crafted RTCP packets, aka Bug ID CSCuj72215.
http://tools.cisco.com/security/center/viewAlert.x?alertId=34272
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-3268