Land rapid7#8923, Add additional error checking to mssql_clr_payload module

Author: pbarry-r7

modules/exploits/windows/mssql/mssql_clr_payload.rb

@@ -96,7 +96,13 @@ def get_exploit_version(sql_version_string)
   end
 
   def set_trustworthy(on)
-      mssql_query("ALTER DATABASE [#{datastore['DATABASE']}] SET TRUSTWORTHY #{on ? 'ON' : 'OFF'}", false)
+    result = mssql_query("ALTER DATABASE [#{datastore['DATABASE']}] SET TRUSTWORTHY #{on ? 'ON' : 'OFF'}", false)
+    unless result[:errors].empty?
+      result[:errors].each do |err|
+        vprint_error(err)
+      end
+      fail_with(Failure::Unknown, "Failed to change Trustworthy setting")
+    end
   end
 
   def is_trustworthy
@@ -112,7 +118,13 @@ def enable_clr(enable)
 EXEC sp_configure 'clr enabled', #{enable ? 1 : 0};
 RECONFIGURE;
     ^
-    mssql_query(query, false)
+    result = mssql_query(query, false)
+    unless result[:errors].empty?
+      result[:errors].each do |err|
+        vprint_error(err)
+      end
+      fail_with(Failure::Unknown, "Failed to change CLR setting")
+    end
   end
 
   def is_clr_enabled