Apply the fixes listed below.
Local users can modify system files.
Several insecure temporary files have been identified in AIX that will follow symbolic links when they are created. In addition, these temporary files are created with world-writable permissions. This can lead to denial of service attacks. If the root user executes one of the vulnerable commands while a symbolic link from the corresponding temporary file exists, then the link will be followed and overwrite or create arbitrary system files. However, the root user may be tricked into executing the programs while the symbolic link is in place.