Vulnerability in AIX 3.2.x and 4.x allows local users to gain write access to files on locally or remotely mounted AIX filesystems.

Vulnerability in ptrace in AIX 4.3 allows local users to gain privileges by attaching to a setgid program.

ICMP messages to broadcast addresses are allowed, allowing for a Smurf attack that can cause a denial of service.

Denial of service when an attacker sends many SYN packets to create multiple connections without ever sending an ACK to complete the connection, aka SYN flood.