Stack-based buffer overflow in Oracle Net Services for Oracle Database Server 9i release 2 and earlier allows attackers to execute arbitrary code via a "CREATE DATABASE LINK" query containing a connect string with a long USING parameter.

Oracle Databases running on Windows XP with Simple File Sharing enabled, allows remote attackers to bypass authentication by supplying a valid username.

dbsnmp in Oracle 8.0.5 and 8.1.5, under certain conditions, trusts the PATH environment variable to find and execute the (1) chown or (2) chgrp commands, which allows local users to execute arbitrary code by modifying the PATH to point to Trojan Horse programs.

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.