Vulnerability in shutdown command for HP-UX 11.X and 10.X allows allows local users to gain privileges via malformed input variables.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2000-0413
http://www.securityfocus.com/bid/1214
http://archives.neohapsis.com/archives/bugtraq/2000-05/0047.html