This indicates an attack attempt against a Denial-of-Service vulnerability in HP OpenView Network Node Manager.
The vulnerability is caused by an error when the vulnerable software handles an invalid Error Code field in a packet. A remote attacker may be able to exploit this to cause a denial of service condition on the affected system.
HP OpenView Network Node Manager 7.52 and prior
Denial of Service: Remote attackers can crash vulnerable systems.
Apply patch, available from the website.