Real-time collaboration for Jupyter Notebooks, Linux Terminals, LaTeX, VS Code, R IDE, and more,
all in one place.

1
##
2
# This module requires Metasploit: https://metasploit.com/download
3
# Current source: https://github.com/rapid7/metasploit-framework
4
##
5

6
class MetasploitModule < Msf::Post
7

8
  def initialize(info = {})
9
    super(
10
      update_info(
11
        info,
12
        'Name' => 'Module to Probe Different Data Points in a CAN Packet',
13
        'Description' => %q{
14
          Scans between two CAN IDs and writes data at each byte position. It will
15
          either write a set byte value (Default 0xFF) or iterate through all possible values
16
          of that byte position (takes much longer). Does not check for responses and is
17
          basically a simple blind fuzzer.
18
        },
19
        'License' => MSF_LICENSE,
20
        'Author' => ['Craig Smith'],
21
        'Platform' => ['hardware'],
22
        'SessionTypes' => ['hwbridge']
23
      )
24
    )
25
    register_options([
26
      OptInt.new('STARTID', [false, 'CAN ID to start scan', 0x300]),
27
      OptInt.new('STOPID', [false, 'CAN ID to stop scan', nil]),
28
      OptInt.new('PROBEVALUE', [false, 'Value to inject in the data stream', 0xFF]),
29
      OptInt.new('PADDING', [false, 'If a value is given a full 8 bytes will be used and padded with this value', nil]),
30
      OptBool.new('FUZZ', [false, 'If true interates through all possible values for each data position', false]),
31
      OptString.new('CANBUS', [false, 'CAN Bus to perform scan on, defaults to connected bus', nil])
32
    ])
33
  end
34

35
  def run
36
    unless client.automotive
37
      print_error('The hwbridge requires a functional automotive extention')
38
      return
39
    end
40
    stopid = datastore['STARTID']
41
    stopid = datastore['STOPID'] unless datastore['STOPID'].nil?
42
    data = '%02X' % datastore['PROBEVALUE']
43
    (datastore['STARTID']..stopid).each do |id|
44
      print_status("Probing 0x#{id.to_s(16)}...")
45
      8.times do |pos|
46
        padding = '00' * pos
47
        endpadding = ''
48
        endpadding = ('%02X' % datastore['PADDING']) * (7 - pos) if !datastore['PADDING'].nil?
49
        if datastore['FUZZ']
50
          256.times do |fuzzdata|
51
            client.automotive.cansend(datastore['CANBUS'], id.to_s(16), padding + ('%02X' % fuzzdata) + endpadding)
52
          end
53
        else
54
          client.automotive.cansend(datastore['CANBUS'], id.to_s(16), padding + data + endpadding)
55
        end
56
      end
57
    end
58
    print_status('Probe Complete')
59
  end
60
end
61

62