The dtterm terminal emulator allows attackers to modify the window title via a certain character escape sequence and then insert it back to the command line in the user's terminal, e.g. when the user views a file containing the malicious sequence, which could allow the attacker to execute arbitrary commands.
Buffer overflow in the diagnostics library in AIX allows local users to "cause data and instructions to be overwritten" via a long DIAGNOSTICS environment variable.
IBM AIX 4.3.3 and AIX 5 allows remote attackers to cause a denial of service (CPU consumption or crash) via a flood of malformed TCP packets without any flags set, which prevents AIX from releasing the associated memory buffers.
Buffer overflow in Common Desktop Environment (CDE) ToolTalk RPC database server (rpc.ttdbserverd) allows remote attackers to execute arbitrary code via an argument to the _TT_CREATE_FILE procedure.