Oracle Database 9i and 10g disables Fine Grained Audit (FGA) after the SYS user executes a SELECT statement on an FGA object, which makes it easier for attackers to escape detection.
Buffer overflow in Oracle iSQL*Plus web application of the Oracle 9 database server allows remote attackers to execute arbitrary code via a long USERID parameter in the isqlplus URL.
TNS Listener in Oracle Net Services for Oracle 9i 9.2.x and 9.0.x, and Oracle 8i 8.1.x, allows remote attackers to cause a denial of service (hang or crash) via a SERVICE_CURLOAD command.