Buffer overflow in the atm subset in arp in devices.common.IBM.atm.rte in AIX 5.2 and 5.3 allows local users to gain root privileges.
http://www.vupen.com/english/advisories/2007/2678
http://www-1.ibm.com/support/docview.wss?uid=isg1IZ00521
http://www-1.ibm.com/support/docview.wss?uid=isg1IZ00510
http://securitytracker.com/id?1018463