Oracle 8i and 9i with PL/SQL package for External Procedures (EXTPROC) allows remote attackers to bypass authentication and execute arbitrary functions by using the TNS Listener to directly connect to the EXTPROC process.
Oracle 9i Application Server stores XSQL and SOAP configuration files insecurely, which allows local users to obtain sensitive information including usernames and passwords by requesting (1) XSQLConfig.xml or (2) soapConfig.xml through a virtual directory.