This indicates an attempt to exploit of a buffer-overflow vulnerability in Oracle9i 188.8.131.52 database server.
Oracle 9i has a service called the Oracle XML Database or XDB that can be accessed via an HTTP-based service on TCP port 8080 or an FTP-based service on TCP port 2100. Multiple buffer overflow vulnerabilities are reported in it that may allow an attacker to execute arbitrary code on the vulnerable system. An attacker may send an overly long username/password to the FTP XDB service to cause a stack-based buffer overflow and execute arbitrary code on the affected system.
Oracle Oracle9i 9.2 .0.1
Unauthorized access to, and compromise of, the affected system.
Upgrade to Oracle Oracle9i 9.2 .0.4. or later