Unknown vulnerability in hztty 2.0 and earlier allows local users to execute arbitrary commands.
https://exchange.xforce.ibmcloud.com/vulnerabilities/19297
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-0020
http://www.securityfocus.com/bid/12518
http://www.debian.org/security/2005/dsa-675