The (1) dbsnmp and (2) nmo programs in Oracle 8i, Oracle 9i, and Oracle IAS 9.0.2.0.1, on Unix systems, use a default path to find and execute library files while operating at raised privileges, which allows certain Oracle user accounts to gain root privileges via a modified libclntsh.so.9.0.

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.

Buffer overflow in tnslsnr of Oracle 8i Database Server 8.1.5 for Linux allows local users to execute arbitrary code as the oracle user via a long command line argument.

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.

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.

dbsnmp in Oracle Intelligent Agent allows local users to gain privileges by setting the ORACLE_HOME environmental variable, which dbsnmp uses to find the nmiconf.tcl script.