Internet Explorer Iframe Sandbox File Name Disclosure Vulnerability - Metasploit


This page contains detailed information about how to use the auxiliary/gather/ie_sandbox_findfiles metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

Table Of Contents
hide

Module Overview

Name: Internet Explorer Iframe Sandbox File Name Disclosure Vulnerability
Module: auxiliary/gather/ie_sandbox_findfiles
Source code: modules/auxiliary/gather/ie_sandbox_findfiles.rb
Disclosure date: 2016-08-09
Last modification time: 2020-10-02 17:38:06 +0000
Supported architecture(s): -
Supported platform(s): Windows
Target service / protocol: -
Target network port(s): -
List of CVEs: CVE-2016-3321

It was found that Internet Explorer allows the disclosure of local file names. This issue exists due to the fact that Internet Explorer behaves different for file:// URLs pointing to existing and non-existent files. When used in combination with HTML5 sandbox iframes it is possible to use this behavior to find out if a local file exists. This technique only works on Internet Explorer 10 & 11 since these support the HTML5 sandbox. Also it is not possible to do this from a regular website as file:// URLs are blocked all together. The attack must be performed locally (works with Internet zone Mark of the Web) or from a share.

Module Ranking and Traits

Module Ranking:

  • normal: The exploit is otherwise reliable, but depends on a specific version and can't (or doesn't) reliably autodetect. More information about ranking can be found here.

Basic Usage

msf > use auxiliary/gather/ie_sandbox_findfiles
msf auxiliary(ie_sandbox_findfiles) > exploit

Go back to menu.

Msfconsole Usage

Here is how the gather/ie_sandbox_findfiles auxiliary module looks in the msfconsole:

msf6 > use auxiliary/gather/ie_sandbox_findfiles

msf6 auxiliary(gather/ie_sandbox_findfiles) > show info

       Name: Internet Explorer Iframe Sandbox File Name Disclosure Vulnerability
     Module: auxiliary/gather/ie_sandbox_findfiles
    License: Metasploit Framework License (BSD)
       Rank: Normal
  Disclosed: 2016-08-09

Provided by:
  Yorick Koster

Check supported:
  No

Basic options:
  Name       Current Setting                                                                        Required  Description
  ----       ---------------                                                                        --------  -----------
  PATHS      Testing/Not/Found/Check.txt, Windows/System32/calc.exe, Program Files (x86)/Mozilla F  yes       The list of files to check (comma separated).
             irefox/firefox.exe, Program Files/VMware/VMware Tools/TPAutoConnSvc.exe
  SHARENAME  falcon                                                                                 yes       The name of the top-level share.
  SRVHOST    0.0.0.0                                                                                yes       The local host or network interface to listen on. This must be an address on the local machine or 0.0.0.0 to listen on all addresses.

Description:
  It was found that Internet Explorer allows the disclosure of local 
  file names. This issue exists due to the fact that Internet Explorer 
  behaves different for file:// URLs pointing to existing and 
  non-existent files. When used in combination with HTML5 sandbox 
  iframes it is possible to use this behavior to find out if a local 
  file exists. This technique only works on Internet Explorer 10 & 11 
  since these support the HTML5 sandbox. Also it is not possible to do 
  this from a regular website as file:// URLs are blocked all 
  together. The attack must be performed locally (works with Internet 
  zone Mark of the Web) or from a share.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2016-3321
  https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2016/MS16-095
  https://securify.nl/advisory/SFY20160301/internet_explorer_iframe_sandbox_local_file_name_disclosure_vulnerability.html

Module Options

This is a complete list of options available in the gather/ie_sandbox_findfiles auxiliary module:

msf6 auxiliary(gather/ie_sandbox_findfiles) > show options

Module options (auxiliary/gather/ie_sandbox_findfiles):

   Name       Current Setting                                                                       Required  Description
   ----       ---------------                                                                       --------  -----------
   PATHS      Testing/Not/Found/Check.txt, Windows/System32/calc.exe, Program Files (x86)/Mozilla   yes       The list of files to check (comma separated).
              Firefox/firefox.exe, Program Files/VMware/VMware Tools/TPAutoConnSvc.exe
   SHARENAME  falcon                                                                                yes       The name of the top-level share.
   SRVHOST    0.0.0.0                                                                               yes       The local host or network interface to listen on. This must be an address on the local machine or 0.0.0.0 to listen on all addresses.

Advanced Options

Here is a complete list of advanced options supported by the gather/ie_sandbox_findfiles auxiliary module:

msf6 auxiliary(gather/ie_sandbox_findfiles) > show advanced

Module advanced options (auxiliary/gather/ie_sandbox_findfiles):

   Name            Current Setting  Required  Description
   ----            ---------------  --------  -----------
   ListenerComm                     no        The specific communication channel to use for this service
   SSLCipher                        no        String for SSL cipher spec - "DHE-RSA-AES256-SHA" or "ADH"
   SSLCompression  false            no        Enable SSL/TLS-level compression
   SendRobots      false            no        Return a robots.txt file if asked for one
   URIHOST                          no        Host to use in URI (useful for tunnels)
   URIPORT                          no        Port to use in URI (useful for tunnels)
   VERBOSE         false            no        Enable detailed status messages
   WORKSPACE                        no        Specify the workspace for this module

Auxiliary Actions

This is a list of all auxiliary actions that the gather/ie_sandbox_findfiles module can do:

msf6 auxiliary(gather/ie_sandbox_findfiles) > show actions

Auxiliary actions:

   Name  Description
   ----  -----------

Evasion Options

Here is the full list of possible evasion options supported by the gather/ie_sandbox_findfiles auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 auxiliary(gather/ie_sandbox_findfiles) > show evasion

Module evasion options:

   Name                      Current Setting  Required  Description
   ----                      ---------------  --------  -----------
   HTML::base64              none             no        Enable HTML obfuscation via an embeded base64 html object (IE not supported) (Accepted: none, plain, single_pad, double_pad, random_space_injection)
   HTML::javascript::escape  0                no        Enable HTML obfuscation via HTML escaping (number of iterations)
   HTML::unicode             none             no        Enable HTTP obfuscation via unicode (Accepted: none, utf-16le, utf-16be, utf-16be-marker, utf-32le, utf-32be)
   HTTP::chunked             false            no        Enable chunking of HTTP responses via "Transfer-Encoding: chunked"
   HTTP::compression         none             no        Enable compression of HTTP responses via content encoding (Accepted: none, gzip, deflate)
   HTTP::header_folding      false            no        Enable folding of HTTP headers
   HTTP::junk_headers        false            no        Enable insertion of random junk HTTP headers
   HTTP::no_cache            false            no        Disallow the browser to cache HTTP content
   HTTP::server_name         Apache           yes       Configures the Server header of all outgoing replies
   TCP::max_send_size        0                no        Maximum tcp segment size.  (0 = disable)
   TCP::send_delay           0                no        Delays inserted before every send.  (0 = disable)

Go back to menu.

Error Messages

This module may fail with the following error messages:

Error Messages

Check for the possible causes from the code snippets below found in the module source code. This can often times help in identifying the root cause of the problem.

does not exist

Here is a relevant code snippet related to the "does not exist" error message:

133:	        report_note(host: cli.peerhost, type: 'ie.filenames', data: f)
134:	        print_good("Found file " + f)
135:	        send_response(cli, '')
136:	      when /^\/notfound\/\?f=/
137:	        f = URI.unescape(request.uri.gsub('/notfound/?f=', ''))
138:	        print_error("The file " + f + " does not exist")
139:	        send_response(cli, '')
140:	      when "/"
141:	        resp = create_response(200, "OK")
142:	        resp.body = %Q|<html>
143:	<head>

Go back to menu.

References

See Also

Check also the following modules related to this module:

Authors

Yorick Koster

Version

This page has been produced using Metasploit Framework version 6.1.41-dev. For more modules, visit the Metasploit Module Library.

Go back to menu.