Buffer overflow in setclock command in IBM AIX 4.3.x and earlier may allow local users to execute arbitrary commands via a long argument.
http://www.securityfocus.com/bid/2035
http://www-1.ibm.com/support/search.wss?rs=0&q=IY07831&apar=only
http://www-1.ibm.com/support/search.wss?rs=0&q=IY07790&apar=only