admin/confnetworking.html in PineApp Mail-SeCure 3.70 and earlier on 5099SK and earlier platforms allows remote attackers to execute arbitrary commands via shell metacharacters in the nsserver parameter during an nslookup operation.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2013-6632
http://archives.neohapsis.com/archives/fulldisclosure/2013-11/0139.html