Stack-based buffer overflow in NPSpcSVR.exe in Larson Network Print Server (LstNPS) 9.4.2 build 105 and earlier allows remote attackers to execute arbitrary code via a long argument in a LICENSE command on TCP port 3114.
https://exchange.xforce.ibmcloud.com/vulnerabilities/40421
http://www.vupen.com/english/advisories/2008/0500
http://www.securityfocus.com/archive/1/487956/100/0/threaded