Add the scripts

mysql-brute
  mysql-datatabase
  mysql-empty-password
  mysql-users
  mysql-variables
and the mysql module

scripts/mysql-empty-password.nse

@@ -0,0 +1,54 @@
+description = [[
+Checks for MySQL servers with an empty root and/or anonymous password
+]]
+
+---
+-- @output
+-- 3306/tcp open  mysql
+-- | mysql-empty-password:  
+-- |   anonymous account has empty password
+-- |_  root account has empty password
+
+author = "Patrik Karlsson"
+license = "Same as Nmap--See http://nmap.org/book/man-legal.html"
+categories = {"intrusive", "auth"}
+
+require 'shortport'
+require 'stdnse'
+require 'mysql'
+
+-- Version 0.3
+-- Created 01/15/2010 - v0.1 - created by Patrik Karlsson <patrik@cqure.net>
+-- Revised 01/23/2010 - v0.2 - revised by Patrik Karlsson, added anonymous account check
+-- Revised 01/23/2010 - v0.3 - revised by Patrik Karlsson, fixed abort bug due to try of loginrequest
+
+portrule = shortport.port_or_service(3306, "mysql")
+
+action = function( host, port )
+
+	local socket = nmap.new_socket()
+	local catch = function() socket:close()	end
+	local try = nmap.new_try(catch)
+	local result, response = {}, nil
+	local users = {"", "root"}
+	
+	-- set a reasonable timeout value
+	socket:set_timeout(5000)
+	
+	for _, v in ipairs( users ) do
+		try( socket:connect(host.ip, port.number, "tcp") )	
+		response = try( mysql.receiveGreeting( socket ) )
+		status, response = mysql.loginRequest( socket, { authversion = "post41", charset = response.charset }, v, nil, response.salt )	
+		if response.errorcode == 0 then
+			table.insert(result, string.format("%s account has empty password", ( v=="" and "anonymous" or v ) ) )
+			if nmap.registry.mysqlusers == nil then
+				nmap.registry.mysqlusers = {}
+			end
+			nmap.registry.mysqlusers[v=="" and "anonymous" or v] = ""
+		end
+		socket:close()
+	end
+	
+	return stdnse.format_output(true, result)	
+
+end