Unspecified vulnerability in the Upgrade & Downgrade component of Oracle Database server 8.1.7.4, 9.0.1.5, 9.2.0.7, and 10.1.0.4 has unspecified impact and attack vectors, as identified by Oracle Vuln# DB28.  NOTE: details are unavailable from Oracle, but they have not publicly disputed a claim by a reliable independent researcher that states that the problem is SQL injection in the DBMS_REGISTRY package in certain parameters to the (1) IS_COMPONENT, (2) GET_COMP_OPTION, (3) DISABLE_DDL_TRIGGERS, (4) SCRIPT_EXISTS, (5) COMP_PATH, (6) GATHER_STATS, (7) NOTHING_SCRIPT, and (8) VALIDATE_COMPONENTS functions.