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::Scanner
9
  include Msf::Auxiliary::Report
10

11
  def initialize(info = {})
12
    super(
13
      update_info(
14
        info,
15
        'Name' => 'SerComm Network Device Backdoor Detection',
16
        'Description' => %q{
17
          This module can identify SerComm manufactured network devices which
18
          contain a backdoor, allowing command injection or account disclosure.
19
        },
20
        'Author' => [
21
          'Eloi Vanderbeken <eloi.vanderbeken[at]gmail.com>', # Initial discovery, poc
22
          'Matt "hostess" Andreko <mandreko[at]accuvant.com>' # Msf module
23
        ],
24
        'License' => MSF_LICENSE,
25
        'References' => [
26
          [ 'CVE', '2014-0659' ],
27
          [ 'OSVDB', '101653' ],
28
          [ 'URL', 'https://github.com/elvanderb/TCP-32764' ]
29
        ],
30
        'DisclosureDate' => '2013-12-31',
31
        'Notes' => {
32
          'Reliability' => UNKNOWN_RELIABILITY,
33
          'Stability' => UNKNOWN_STABILITY,
34
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
35
        }
36
      )
37
    )
38

39
    register_options([
40
      Opt::RPORT(32764)
41
    ])
42
  end
43

44
  def do_report(ip, endianness)
45
    report_vuln({
46
      :host => ip,
47
      :port => rport,
48
      :name => "SerComm Network Device Backdoor",
49
      :refs => self.references,
50
      :info => "SerComm Network Device Backdoor found on a #{endianness} device"
51
    })
52
  end
53

54
  def run_host(ip)
55
    begin
56
      connect
57
      sock.put(Rex::Text.rand_text(5))
58
      res = sock.get_once
59
      disconnect
60

61
      if (res && res.start_with?("MMcS"))
62
        print_good("#{ip}:#{rport} - Possible backdoor detected - Big Endian")
63
        do_report(ip, "Big Endian")
64
      elsif (res && res.start_with?("ScMM"))
65
        print_good("#{ip}:#{rport} - Possible backdoor detected - Little Endian")
66
        do_report(ip, "Little Endian")
67
      else
68
        vprint_status("#{ip}:#{rport} - Backdoor not detected.")
69
      end
70
    rescue Rex::ConnectionError => e
71
      vprint_error("#{ip}:#{rport} - Connection failed: #{e.class}: #{e}")
72
    end
73
  end
74
end
75

76