Ubuntu Security Notice USN-190-2 – A remote Denial of Service has been discovered in the SMNP (Simple Network Management Protocol) library. If a SNMP agent uses TCP sockets for communication, a malicious SNMP server could exploit this to crash the agent. Please note that by default SNMP uses UDP sockets.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/41886/USN-190-2.txt
Source: https://packetstormsecurity.com/files/41886/Ubuntu-Security-Notice-190-2.html