The Net::LDAP (aka net-ldap) gem before 0.16.0 for Ruby has Missing SSL Certificate Validation.Referenceshttp://openwall.com/lists/oss-security/2017/12/17/10https://github.com/ruby-ldap/ruby-net-ldap/issues/258https://github.com/ruby-ldap/ruby-net-ldap/pull/279