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.

Buffer overflow in dbsnmp in Oracle 8.0.6 through 9.0.1 allows local users to execute arbitrary code via a long ORACLEHOME environment variable.

dbsnmp in Oracle 8.1.6 and 8.1.7 uses the ORACLEHOME environment variable to find and execute the dbsnmp program, which allows local users to execute arbitrary programs by pointing the ORACLEHOME to an alternate directory that contains a malicious version of dbsnmp.

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.