nxconfigure.sh in NoMachine NX Server before 2.1.0-18 does not validate the invoking user, which allows local users to modify server configuration keys in /usr/NX/etc/server.cfg, resulting in an unspecified denial of service.
https://exchange.xforce.ibmcloud.com/vulnerabilities/31941
http://www.vupen.com/english/advisories/2007/0413
http://www.securityfocus.com/bid/22308
http://www.nomachine.com/tr/view.php?id=TR01E01622
http://www.nomachine.com/news_read.php?idnews=190