This indicates an attack attempt to exploit a Buffer Overflow vulnerability in Oracle Database Server.
The vulnerability is due to an improper boundary check condition in the application. A remote attacker may be able to exploit this to execute arbitrary code within the context of the application, via a crafted request.
Oracle Database Server 184.108.40.206, 220.127.116.11, 18.104.22.168, 22.214.171.124, and 126.96.36.199
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.