named-xfer in AIX 4.1.5 and 4.2.1 allows members of the system group to overwrite system files to gain root access via the -f parameter and a malformed zone file.
snap command in AIX before 4.3.2 creates the /tmp/ibmsupt directory with world-readable permissions and does not remove or clear the directory when snap -a is executed, which could allow local users to access the shadowed password file by creating /tmp/ibmsupt/general/passwd before root runs snap -a.