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#!/usr/bin/env ruby
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##
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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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#
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# This script lists each module with its references
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#
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msfbase = __FILE__
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msfbase = File.expand_path(File.readlink(msfbase), File.dirname(msfbase)) while File.symlink?(msfbase)
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$:.unshift(File.expand_path(File.join(File.dirname(msfbase), '..', '..', 'lib')))
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require 'msfenv'
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$:.unshift(ENV['MSF_LOCAL_LIB']) if ENV['MSF_LOCAL_LIB']
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require 'rex'
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require 'uri'
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# See lib/msf/core/module/reference.rb
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# We gsub '#{in_ctx_val}' with the actual value
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def types
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  {
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    'ALL' => '',
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    'CVE' => 'https://nvd.nist.gov/vuln/detail/CVE-#{in_ctx_val}',
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    'CWE' => 'http://cwe.mitre.org/data/definitions/#{in_ctx_val}.html',
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    'BID' => 'http://www.securityfocus.com/bid/#{in_ctx_val}',
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    'MSB' => 'https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/#{in_ctx_val}',
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    'EDB' => 'http://www.exploit-db.com/exploits/#{in_ctx_val}',
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    'US-CERT-VU' => 'http://www.kb.cert.org/vuls/id/#{in_ctx_val}',
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    'ZDI' => 'http://www.zerodayinitiative.com/advisories/ZDI-#{in_ctx_val}',
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    'WPVDB' => 'https://wpscan.com/vulnerability/#{in_ctx_val}',
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    'PACKETSTORM' => 'https://packetstormsecurity.com/files/#{in_ctx_val}',
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    'URL' => '#{in_ctx_val}'
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  }
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end
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STATUS_ALIVE = 'Alive'
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STATUS_DOWN = 'Down'
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STATUS_REDIRECT = 'Redirect'
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STATUS_UNSUPPORTED = 'Unsupported'
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sort = 0
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filter = 'All'
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filters = ['all', 'exploit', 'payload', 'post', 'nop', 'encoder', 'auxiliary']
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type = 'ALL'
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match = nil
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check = false
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save = nil
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is_url_alive_cache = {}
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http_timeout = 20
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$verbose = false
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opts = Rex::Parser::Arguments.new(
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  '-h' => [ false, 'Help menu.' ],
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  '-c' => [ false, 'Check Reference status'],
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  '-s' => [ false, 'Sort by Reference instead of Module Type.'],
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  '-r' => [ false, 'Reverse Sort'],
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  '-f' => [ true, 'Filter based on Module Type [All,Exploit,Payload,Post,NOP,Encoder,Auxiliary] (Default = ALL).'],
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  '-t' => [ true, "Type of Reference to sort by #{types.keys}"],
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  '-x' => [ true, 'String or RegEx to try and match against the Reference Field'],
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  '-o' => [ true, 'Save the results to a file'],
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  '--csv' => [ false, 'Save the results file in CSV format'],
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  '-i' => [ true, 'Set an HTTP timeout'],
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  '-v' => [ false, 'Verbose']
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)
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flags = []
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opts.parse(ARGV) do |opt, _idx, val|
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  case opt
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  when '-h'
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    puts "\nMetasploit Script for Displaying Module Reference information."
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    puts '=========================================================='
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    puts opts.usage
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    exit
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  when '-c'
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    flags << 'URI Check: Yes'
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    check = true
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  when '-s'
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    flags << 'Order: Sorting by Reference'
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    sort = 1
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  when '-r'
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    flags << 'Order: Reverse Sorting'
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    sort = 2
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  when '-f'
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    unless filters.include?(val.downcase)
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      puts "Invalid Filter Supplied: #{val}"
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      puts "Please use one of these: #{filters.map { |f| f.capitalize }.join(', ')}"
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      exit
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    end
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    flags << "Module Filter: #{val}"
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    filter = val
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  when '-t'
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    val = (val || '').upcase
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    unless types.has_key?(val)
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      puts "Invalid Type Supplied: #{val}"
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      puts "Please use one of these: #{types.keys.inspect}"
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      exit
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    end
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    type = val
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  when '-i'
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    http_timeout = /^\d+/ === val ? val.to_i : 20
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  when '-v'
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    $verbose = true
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  when '-x'
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    flags << "Regex: #{val}"
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    match = Regexp.new(val)
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  when '-o'
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    flags << 'Output to file: Yes'
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    save = val
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  when '--csv'
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    flags << 'Output as CSV'
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    $csv = true
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  end
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end
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if $csv && save.nil?
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  abort('Error: -o flag required when using CSV output')
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end
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flags << "Type: #{type}"
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puts flags * ' | '
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def get_ipv4_addr(hostname)
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  Rex::Socket.getaddresses(hostname, false)[0]
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end
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def vprint_debug(msg = '')
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  print_debug(msg) if $verbose
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end
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def print_debug(msg = '')
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  warn "[*] #{msg}"
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end
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def is_url_alive(uri, http_timeout, cache)
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  if cache.key? uri.to_s
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    print_debug("Cached: #{uri} -> #{cache[uri]}")
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    return cache[uri.to_s]
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  end
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  print_debug("Checking: #{uri}")
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  begin
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    uri = URI(uri)
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    rhost = get_ipv4_addr(uri.host)
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  rescue SocketError, URI::InvalidURIError => e
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    vprint_debug("#{e.message} in #is_url_alive")
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    return STATUS_DOWN
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  end
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  rport = uri.port || 80
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  path = uri.path.blank? ? '/' : uri.path
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  vhost = rport == 80 ? uri.host : "#{uri.host}:#{rport}"
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  if uri.scheme == 'https'
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    cli = ::Rex::Proto::Http::Client.new(rhost, 443, {}, true)
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  else
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    cli = ::Rex::Proto::Http::Client.new(rhost, rport)
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  end
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  begin
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    cli.connect(http_timeout)
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    req = cli.request_raw('uri' => path, 'vhost' => vhost)
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    res = cli.send_recv(req, http_timeout)
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  rescue Errno::ECONNRESET, Rex::ConnectionError, Rex::ConnectionRefused, Rex::HostUnreachable, Rex::ConnectionTimeout, Rex::UnsupportedProtocol, ::Timeout::Error, Errno::ETIMEDOUT, ::Exception => e
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    vprint_debug("#{e.message} for #{uri}")
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    cache[uri.to_s] = STATUS_DOWN
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    return STATUS_DOWN
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  ensure
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    cli.close
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  end
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  if !res.nil? && res.code.to_s =~ %r{3\d\d}
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    if res.headers['Location']
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      vprint_debug("Redirect: #{uri} redirected to #{res.headers['Location']}")
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    else
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      print_error("Error: Couldn't find redirect location for #{uri}")
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    end
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    cache[uri.to_s] = STATUS_REDIRECT
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    return STATUS_REDIRECT
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  elsif res.nil? || res.body =~ %r{<title>.*not found</title>}i || !res.code.to_s =~ %r{2\d\d}
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    vprint_debug("Down: #{uri} returned a not-found response")
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    cache[uri.to_s] = STATUS_DOWN
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    return STATUS_DOWN
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  end
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  vprint_debug("Good: #{uri}")
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  cache[uri.to_s] = STATUS_ALIVE
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  STATUS_ALIVE
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end
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def save_results(path, results)
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  File.open(path, 'wb') do |f|
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    f.write(results)
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  end
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  puts "Results saved to: #{path}"
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rescue Exception => e
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  puts "Failed to save the file: #{e.message}"
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end
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# Always disable the database (we never need it just to list module
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# information).
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framework_opts = { 'DisableDatabase' => true }
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# If the user only wants a particular module type, no need to load the others
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if filter.downcase != 'all'
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  framework_opts[:module_types] = [ filter.downcase ]
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end
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# Initialize the simplified framework instance.
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$framework = Msf::Simple::Framework.create(framework_opts)
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if check
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  columns = [ 'Module', 'Status', 'Reference' ]
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else
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  columns = [ 'Module', 'Reference' ]
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end
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tbl = Rex::Text::Table.new(
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  'Header' => 'Module References',
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  'Indent' => 2,
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  'Columns' => columns
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)
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bad_refs_count = 0
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$framework.modules.each do |name, mod|
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  if mod.nil?
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    elog("module_reference.rb is unable to load #{name}")
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    next
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  end
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  next if match and !(name =~ match)
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  x = mod.new
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  x.references.each do |r|
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    ctx_id = r.ctx_id.upcase
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    ctx_val = r.ctx_val
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    next unless type == 'ALL' || type == ctx_id
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    if check
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      if types.has_key?(ctx_id)
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        if ctx_id == 'MSB'
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          year = ctx_val[2..3]
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          century = year[0] == '9' ? '19' : '20'
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          new_ctx_val = "#{century}#{year}/#{ctx_val}"
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          uri = types[r.ctx_id.upcase].gsub(/\#{in_ctx_val}/, new_ctx_val)
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        else
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          uri = types[r.ctx_id.upcase].gsub(/\#{in_ctx_val}/, r.ctx_val.to_s)
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        end
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        status = is_url_alive(uri, http_timeout, is_url_alive_cache)
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        bad_refs_count += 1 if status == STATUS_DOWN
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      else
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        # The reference ID isn't supported so we don't know how to check this
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        bad_refs_count += 1
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        status = STATUS_UNSUPPORTED
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      end
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    end
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    ref = "#{r.ctx_id}-#{r.ctx_val}"
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    new_column = []
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    new_column << x.fullname
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    new_column << status if check
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    new_column << ref
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    tbl << new_column
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  end
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end
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if sort == 1
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  tbl.sort_rows(1)
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end
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if sort == 2
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  tbl.sort_rows(1)
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  tbl.rows.reverse
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end
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puts
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puts tbl.to_s
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puts
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puts "Number of bad references found: #{bad_refs_count}" if check
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save_results(save, $csv.nil? ? tbl.to_s : tbl.to_csv) if save
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