View online: https://www.drupal.org/sa-core-2024-006 Project: Drupal core [1] Date: 2024-November-20 Security risk: *Less critical* 8 ∕ 25 AC:Complex/A:User/CI:None/II:Some/E:Theoretical/TD:Uncommon [2] Vulnerability: Gadget chain Affected versions: >= 8.0.0 < 10.2.11 || >= 10.3.0 < 10.3.9 || >= 11.0.0 < 11.0.8 Description:  Drupal core contains a potential PHP Object Injection vulnerability that (if combined with another exploit) could lead to Artbitrary File Deletion. It is not directly exploitable. This issue is mitigated by the fact that in order to be exploitable, a separate vulnerability must be present that allows an attacker to pass unsafe input to unserialize(). There are no such known exploits in Drupal core. To help protect against this vulnerability, types have been added to properties in some of Drupal core's classes. If an application extends those classes, the same types may need to be specified on the subclass to avoid a TypeError. Solution:  Install the latest version: * If you are using Drupal 10.2, update to Drupal 10.2.11. [3] * If you are using Drupal 10.3, update to Drupal 10.3.9. [4] * If you are using Drupal 11.0, update to Drupal 11.0.8. [5] * Drupal 7 is not affected. All versions of Drupal 10 prior to 10.2 are end-of-life and do not receive security coverage. (Drupal 8 [6] and Drupal 9 [7] have both reached end-of-life.) Reported By:  * Drew Webber [8] of the Drupal Security Team Fixed By:  * Drew Webber [9] of the Drupal Security Team * Lee Rowlands [10] of the Drupal Security Team Coordinated By:  * Juraj Nemec [11] of the Drupal Security Team * Benji Fisher [12] of the Drupal Security Team * xjm [13] of the Drupal Security Team [1] https://www.drupal.org/project/drupal [2] https://www.drupal.org/security-team/risk-levels [3] https://www.drupal.org/project/drupal/releases/10.2.11 [4] https://www.drupal.org/project/drupal/releases/10.3.9 [5] https://www.drupal.org/project/drupal/releases/11.0.8 [6] https://www.drupal.org/psa-2021-06-29 [7] https://www.drupal.org/psa-2023-11-01 [8] https://www.drupal.org/user/255969 [9] https://www.drupal.org/user/255969 [10] https://www.drupal.org/user/395439 [11] https://www.drupal.org/user/272316 [12] https://www.drupal.org/user/683300 [13] https://www.drupal.org/u/xjm