99 lines
2.7 KiB
Ruby
99 lines
2.7 KiB
Ruby
##
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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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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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##
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require 'msf/core'
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require "net/dns/resolver"
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require 'rex'
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class Metasploit3 < Msf::Auxiliary
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include Msf::Auxiliary::Report
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'DNS Reverse Lookup Enumeration',
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'Description' => %q{
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This module performs DNS reverse lookup against a given IP range in order to
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retrieve valid addresses and names.
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},
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'Author' => [ 'Carlos Perez <carlos_perez[at]darkoperator.com>' ],
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'License' => BSD_LICENSE
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))
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register_options(
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[
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OptAddressRange.new('RANGE', [true, 'IP range to perform reverse lookup against.']),
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OptAddress.new('NS', [ false, "Specify the nameserver to use for queries, otherwise use the system DNS." ])
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], self.class)
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register_advanced_options(
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[
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OptInt.new('RETRY', [ false, "Number of tries to resolve a record if no response is received.", 2]),
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OptInt.new('RETRY_INTERVAL', [ false, "Number of seconds to wait before doing a retry.", 2]),
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OptInt.new('THREADS', [ true, "The number of concurrent threads.", 1])
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], self.class)
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end
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def run
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@res = Net::DNS::Resolver.new()
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if datastore['RETRY']
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@res.retry = datastore['RETRY'].to_i
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end
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if datastore['RETRY_INTERVAL']
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@res.retry_interval = datastore['RETRY_INTERVAL'].to_i
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end
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@threadnum = datastore['THREADS'].to_i
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switchdns() unless datastore['NS'].nil?
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reverselkp(datastore['RANGE'])
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end
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def reverselkp(iprange)
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print_status("Running reverse lookup against IP range #{iprange}")
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ar = Rex::Socket::RangeWalker.new(iprange)
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tl = []
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while (true)
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# Spawn threads for each host
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while (tl.length <= @threadnum)
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ip = ar.next_ip
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break if not ip
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tl << framework.threads.spawn("Module(#{self.refname})-#{ip}", false, ip.dup) do |tip|
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begin
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query = @res.query(tip)
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query.each_ptr do |addresstp|
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print_status("Host Name: #{addresstp}, IP Address: #{tip.to_s}")
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report_host(
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:host => tip.to_s,
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:name => addresstp
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)
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end
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rescue ::Interrupt
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raise $!
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rescue ::Rex::ConnectionError
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rescue ::Exception => e
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print_error("Error: #{tip}: #{e.message}")
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end
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end
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end
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# Exit once we run out of hosts
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if(tl.length == 0)
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break
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end
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tl.first.join
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tl.delete_if { |t| not t.alive? }
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end
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end
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def switchdns()
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print_status("Using DNS server: #{datastore['NS']}")
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@res.nameserver=(datastore['NS'])
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@nsinuse = datastore['NS']
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end
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end
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