CommuniGate Pro Core Server before 5.0.7 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via LDAP messages with negative BER lengths, and possibly other vectors, as demonstrated by the ProtoVer LDAP test suite.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24409
http://www.vupen.com/english/advisories/2006/0364
http://www.stalker.com/CommuniGatePro/History.html
http://www.securityfocus.com/bid/16407
http://www.securityfocus.com/archive/1/423364/100/0/threaded