92 lines
2.4 KiB
Ruby
92 lines
2.4 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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require 'rex/proto/rfb'
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class Metasploit3 < Msf::Auxiliary
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include Msf::Exploit::Remote::Tcp
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include Msf::Auxiliary::Report
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include Msf::Auxiliary::Scanner
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def initialize
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super(
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'Name' => 'VNC Authentication None Detection',
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'Description' => 'Detect VNC servers that support the "None" authentication method.',
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'References' =>
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[
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['URL', 'http://en.wikipedia.org/wiki/RFB'],
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['URL', 'http://en.wikipedia.org/wiki/Vnc'],
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],
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'Author' =>
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[
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'Matteo Cantoni <goony[at]nothink.org>',
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'jduck'
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],
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'License' => MSF_LICENSE
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)
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register_options(
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[
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Opt::RPORT(5900)
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], self.class)
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end
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def run_host(target_host)
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connect
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begin
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vnc = Rex::Proto::RFB::Client.new(sock)
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if not vnc.handshake
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raise RuntimeError.new("Handshake failed: #{vnc.error}")
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end
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ver = "#{vnc.majver}.#{vnc.minver}"
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print_status("#{target_host}:#{rport}, VNC server protocol version : #{ver}")
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svc = report_service(
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:host => rhost,
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:port => rport,
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:proto => 'tcp',
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:name => 'vnc',
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:info => "VNC protocol version #{ver}"
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)
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type = vnc.negotiate_authentication
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if not type
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raise RuntimeError.new("Auth negotiation failed: #{vnc.error}")
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end
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# Show the allowed security types
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sec_type = []
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vnc.auth_types.each { |type|
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sec_type << Rex::Proto::RFB::AuthType.to_s(type)
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}
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print_status("#{target_host}:#{rport}, VNC server security types supported : #{sec_type.join(",")}")
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if (vnc.auth_types.include? Rex::Proto::RFB::AuthType::None)
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print_good("#{target_host}:#{rport}, VNC server security types includes None, free access!")
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report_vuln(
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{
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:host => rhost,
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:service => svc,
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:name => self.name,
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:info => "Module #{self.fullname} identified the VNC 'none' security type: #{sec_type.join(", ")}",
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:refs => self.references,
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:exploited_at => Time.now.utc
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})
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end
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rescue RuntimeError
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print_error("#{target_host}:#{rport}, #{$!}")
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raise $!
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ensure
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disconnect
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end
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end
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end
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