Cisco Unified Communications Manager IM and Presence Service 9.1(1) SU6 9.1(1) SU6a 9.1(1) SU7 10.5(2) SU2 10.5(2) SU2a 11.0(1) SU1 and 11.5(1) allows remote attackers to cause a denial of service (sipd process restart) via crafted headers in a SIP packet aka Bug ID CSCva39072.