Fix legacy railgun LDAP implementation

Author: Meatballs1

lib/msf/core/post/windows/ldap.rb

@@ -149,7 +149,7 @@ def get_default_naming_context(domain=nil)
       query_result = query_ldap(session_handle, "", 0, "(objectClass=computer)", ["defaultNamingContext"])
       first_entry_fields = query_result[:results].first
       # Value from First Attribute of First Entry
-      default_naming_context = first_entry_fields.first
+      default_naming_context = first_entry_fields.first[:value]
       vprint_status("Default naming context #{default_naming_context}")
       return default_naming_context
     end
@@ -231,7 +231,7 @@ def query_ldap(session_handle, base, scope, filter, fields)
         values_result = values.join(',') if values
         vprint_status("Values #{values}")
 
-        field_results << values_result
+        field_results << {:type => 'unknown', :value => values_result}
       end
 
       entry_results << field_results