79 lines
2.4 KiB
Ruby
79 lines
2.4 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
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super(
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'Name' => 'NTP Mode 6 UNSETTRAP DRDoS Scanner',
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'Description' => %q{
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This module identifies NTP servers which permit mode 6 UNSETTRAP requests that
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can be used to conduct DRDoS attacks. In some configurations, NTP servers will
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respond to UNSETTRAP requests with multiple packets, allowing remote attackers
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to cause a distributed, reflected denial of service (aka, "DRDoS" or traffic
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amplification) via spoofed requests.
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},
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'Author' => 'Jon Hart <jon_hart[at]rapid7.com>',
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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', 'https://github.com/rapid7/metasploit-framework/pull/3696'],
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['URL', 'http://r-7.co/R7-2014-12']
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],
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'DisclosureDate' => 'Aug 25 2014',
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'License' => MSF_LICENSE
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)
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end
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# Called for each response packet
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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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# Called before the scan block
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def scanner_prescan(batch)
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@results = {}
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@probe = Rex::Proto::NTP::NTPControl.new
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@probe.version = datastore['VERSION']
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@probe.operation = 31
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end
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# Called after the scan block
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def scanner_postscan(batch)
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@results.keys.each do |k|
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response_map = { @probe => @results[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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)
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peer = "#{k}:#{rport}"
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vulnerable, proof = prove_amplification(response_map)
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what = 'R7-2014-12 NTP Mode 6 UNSETTRAP 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 => self.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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