diff -rupN /home/stoty/Downloads/mysql-connector-java-5.1.27/src/com/mysql/jdbc/MysqlIO.java ./src/com/mysql/jdbc/MysqlIO.java
--- /home/stoty/Downloads/mysql-connector-java-5.1.27/src/com/mysql/jdbc/MysqlIO.java	2013-10-23 23:45:44.000000000 +0200
+++ ./src/com/mysql/jdbc/MysqlIO.java	2013-11-12 21:47:29.326744701 +0100
@@ -1742,6 +1742,11 @@ public class MysqlIO {
 					// no challenge so this is a changeUser call
 					plugin = getAuthenticationPlugin(this.defaultAuthenticationPluginProtocolName);
 					checkConfidentiality(plugin);
+					
+					//We need to reuse the auth_data sent by the server during the initial handshake
+					if(seed != null){
+						fromServer = new Buffer(StringUtils.getBytes(this.seed));
+					}
 				}
 
 			} else {