reCAPTCHA v3 module for Drupal: Unauthorised Access -- Remote/Unauthenticated

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.1686
  Drupal - reCAPTCHA v3 - Critical - Access bypass (SA-CONTRIB-2020-019)
                                14 May 2020

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           reCAPTCHA v3 module for Drupal
Publisher:         Drupal
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Unauthorised Access -- Remote/Unauthenticated
Resolution:        Patch/Upgrade

Original Bulletin: 
   https://www.drupal.org/sa-contrib-2020-019

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Drupal. It is recommended that administrators 
         running reCAPTCHA v3 module for Drupal check for an updated version
         of the software for their operating system.

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reCAPTCHA v3 - Critical - Access bypass - SA-CONTRIB-2020-019

Project: reCAPTCHA v3
Date: 2020-May-13

Security risk: 
Critical 18/25 AC:None/A:None/CI:Some/II:Some/E:Theoretical/TD:All

Vulnerability: Access bypass

Description: 
The reCaptcha v3 module enables you to protect your forms using the Google
reCaptcha V3.

If the reCaptcha v3 challenge succeeds, all the other form validations are
bypassed. This makes it possible for attackers to submit invalid or incomplete
forms.

This vulnerability only affects forms that are protected by reCaptcha v3 and
have server side validation steps (e.g required field or custom validation
functions).

Solution: 
Install the latest version:

  o If you use the reCAPTCHA v3 module for Drupal 8.x, upgrade to reCAPTCHA v3
    8.x-1.2

Also see the reCAPTCHA v3 project page.

Reported By: 
  o arnaudvz
  o Martijn Vermeulen

Fixed By: 
  o Denis V*****
  o Majid Ali Khan

Coordinated By: 
  o Greg Knaddison of the Drupal Security Team

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