Vulnerability in Mandrake Linux usermode package allows local users to to reboot or halt the system.
https://exchange.xforce.ibmcloud.com/vulnerabilities/4944
http://www.securityfocus.com/bid/1489
http://www.redhat.com/support/errata/RHSA-2000-053.html
http://archives.neohapsis.com/archives/bugtraq/2000-08/0117.html
http://archives.neohapsis.com/archives/bugtraq/2000-07/0251.html