Hight.php完整代码如下：
<?php
if (isset($_GET['Change'])) {
// Turn requests into variables
$pass_curr = $_GET['password_current'];
$pass_new = $_GET['password_new'];
$pass_conf = $_GET['password_conf'];
// Sanitise current password input
$pass_curr = stripslashes( $pass_curr );
$pass_curr = mysql_real_escape_string( $pass_curr );
$pass_curr = md5( $pass_curr );
// Check that the current password is correct
$qry = "SELECT password FROM `users` WHERE user='admin' AND password='$pass_curr';";
$result = mysql_query($qry) or die('<pre>' . mysql_error() . '</pre>' );
if (($pass_new == $pass_conf) && ( $result && mysql_num_rows( $result ) == 1 )){
$pass_new = mysql_real_escape_string($pass_new);
$pass_new = md5($pass_new);
$insert="UPDATE `users` SET password = '$pass_new' WHERE user = 'admin';";
$result=mysql_query($insert) or die('<pre>' . mysql_error() . '</pre>' );
$html .= "<pre> Password Changed </pre>";
mysql_close();
}
else{
$html .= "<pre> Passwords did not match or current password incorrect. </pre>";
}
}
?>
我们来看看这次他是如何防御CSRF漏洞的。
这次要输入原先的密码然后才可以输入新的密码。
这个属于二次验证。这个是相对现在预防csrf较为有效行之有效的预防措施。这个关卡应该是没办法绕过的。如果大家可以绕过，分享分享姿势哈。