lpsystem in OpenUnix 8.0.0 allows local users to cause a denial of service and possibly execute arbitrary code via a long command line argument.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2001-1134
http://www.securityfocus.com/bid/3248
http://www.iss.net/security_center/static/7041.php
http://archives.neohapsis.com/archives/bugtraq/2001-08/0391.html