This indicates a possible attempt to exploit a buffer-overflow vulnerability in Oracle Secure Backup.
The vulnerability is located in obndmpd.exe while handling malformed NDMP_CONNECT_CLIENT_AUTH commands. It may allow remote attackers to execute arbitrary code in the context of the application. Failed exploit attempts will likely cause the program to crash, resulting in a denial-of-service condition.
Oracle Secure Backup 10.2
System Compromise: Remote attackers can gain control of vulnerable systems.
Refer to the vendor's web site for the suggested workaround: