Buffer overflow in the at program on IBM AIX 5.3 allows local users to gain privileges via unspecified vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/35976
http://www.vupen.com/english/advisories/2007/2905
http://www.securitytracker.com/id?1018570
http://www.securityfocus.com/bid/25273