This indicates an attempt to exploit a buffer-overflow vulnerability in CA BrightStor ARCserve Backup.
The vulnerability is caused by a boundary error that occurs when the vulnerable software's logging service, known as caloggerd, handles a long Sun-RPC string parameter. A remote attacker can execute arbitrary code by sending a crafted RPC request.
CA BrightStor ARCServe Backup 11.1
CA BrightStor ARCServe Backup 11.5
System Compromise: Remote attackers can gain control of vulnerable systems.
Refer to the vendor's web site for the suggested workaround: