This indicates a possible exploit of a Buffer Overflow vulnerability in IBM WebSphere.
IBM WebSphere Application Server Administrative Console is vulnerable to a Buffer Overflow. There is an error in the authentication module that will allow an attacker to execute arbitrary code.
IBM Websphere Application Server 5.0.2 .9 through 5.0.2.
Compromise of the affected system.
Apply appropriate patch from the vendor or Upgrade to non-vulnerable version if available. Or ensure that the global security option is disabled.