Unspecified vulnerability in Kerio MailServer before 6.3.1 allows remote attackers to cause a denial of service (segmentation fault and service stop) via certain long LDAP queries, as demonstrated by vd_kms6.pm.
https://exchange.xforce.ibmcloud.com/vulnerabilities/30872
http://www.vupen.com/english/advisories/2006/4993
http://www.securityfocus.com/archive/1/454455/100/0/threaded