Multiple vulnerabilities have been identified in Cisco Unified Communications Manager, which could be exploited by attackers to cause a denial of service.
The first issue is caused by a memory consumption error in the Certificate Trust List (CTL) Provider service (enabled by default) when handling a series of malformed TCP packets (default port is 2444/TCP), which may result in the interruption of voice services.
The second vulnerability is caused by an error in the Certificate Authority Proxy Function (CAPF) service (disabled by default) when handling malformed input (default port is 3804/TCP), which could be exploited to create a denial of service condition.
The third issue is caused by errors when handling malformed SIP JOIN and INVITE messages, which may result in the interruption of voice services.
The fourth vulnerability is caused by an error in the SNMP Trap Agent service when handling a series of malformed UDP packets sent to port 61441/UDP, which could be exploited to create a denial of service condition.
