This indicates an attack attempt against a stack-based buffer-overflow vulnerability in VERITAS NetBackup Enterprise Server.
The vulnerability is caused by insufficient checks in a shared library used by the Volume Manager daemon when the vulnerable software handles certain packets. It allows a remote attacker to execute arbitrary code via a malicious packet.
Veritas Software NetBackup:
Enterprise Server 5.1
Enterprise Server 5.0
System compromise: Remote code execution.
Apply the appropriate patch released by the vendor: