View online: https://www.drupal.org/sa-core-2021-008
Project: Drupal core [1] Date: 2021-September-15 Security risk: *Moderately critical* 11∕25 AC:Basic/A:None/CI:None/II:Some/E:Theoretical/TD:Uncommon [2] Vulnerability: Access bypass
CVE IDs: CVE-2020-13675 Description: Drupal's JSON:API and REST/File modules allow file uploads through their HTTP APIs. The modules do not correctly run all file validation, which causes an access bypass vulnerability. An attacker might be able to upload files that bypass the file validation process implemented by modules on the site.
This vulnerability is mitigated by three factors:
1) The JSON:API or REST File upload modules must be enabled on the site. 2) An attacker must have access to a file upload via JSON:API or REST. 3) The site must employ a file validation module.
This advisory is not covered by Drupal Steward [3].
Also see GraphQL - Moderately critical - Access bypass - SA-CONTRIB-2021-029 [4] which addresses a similar vulnerability for that module.
Solution: Install the latest version:
* If you are using Drupal 9.2, update to Drupal 9.2.6 [5]. * If you are using Drupal 9.1, update to Drupal 9.1.13 [6]. * If you are using Drupal 8.9, update to Drupal 8.9.19 [7].
Versions of Drupal 8 prior to 8.9.x and versions of Drupal 9 prior to 9.1.x are end-of-life and do not receive security coverage.
Drupal 7 core is not affected.
Reported By: * Klaus Purer [8]
Fixed By: * Klaus Purer [9] * Lee Rowlands [10] of the Drupal Security Team * Alex Pott [11] of the Drupal Security Team * Jess [12] of the Drupal Security Team * Samuel Mortenson [13] * Drew Webber [14] of the Drupal Security Team * Kim Pepper [15]
[1] https://www.drupal.org/project/drupal [2] https://www.drupal.org/security-team/risk-levels [3] https://www.drupal.org/steward [4] https://www.drupal.org/sa-contrib-2021-029 [5] https://www.drupal.org/project/drupal/releases/9.2.6 [6] https://www.drupal.org/project/drupal/releases/9.1.13 [7] https://www.drupal.org/project/drupal/releases/8.9.19 [8] https://www.drupal.org/user/262198 [9] https://www.drupal.org/user/262198 [10] https://www.drupal.org/user/395439 [11] https://www.drupal.org/user/157725 [12] https://www.drupal.org/user/65776 [13] https://www.drupal.org/user/2582268 [14] https://www.drupal.org/user/255969 [15] https://www.drupal.org/user/370574