Buffer overflow in the arp command of IBM AIX 5.3 L, 5.3, 5.2.2, 5.2 L, and 5.2 allows local users to cause a denial of service (crash) via a long iftype argument.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24628
http://www.vupen.com/english/advisories/2006/0531
http://www.securityfocus.com/bid/16584