Drupal core - Moderately critical - Gadget chain - SA-CORE-2024-007

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Project:

Drupal core

Date:

2024-November-20

Security risk:

Moderately critical 14 ∕ 25 AC:Complex/A:Admin/CI:All/II:All/E:Theoretical/TD:Uncommon

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 Remote Code Execution. It is not directly exploitable.

This issue is mitigated by the fact that in order for it to be exploitable, a separate vulnerability must be present to allow an attacker to pass unsafe input to unserialize(). There are no such known exploits in Drupal core.

To help protect against this potential 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.
If you are using Drupal 10.3, update to Drupal 10.3.9.
If you are using Drupal 11.0, update to Drupal 11.0.8.
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 and Drupal 9 have both reached end-of-life.)

Reported By:

Drew Webber of the Drupal Security Team

Fixed By:

Drew Webber of the Drupal Security Team
Lee Rowlands of the Drupal Security Team

Coordinated By:

Juraj Nemec of the Drupal Security Team
Greg Knaddison of the Drupal Security Team
Benji Fisher of the Drupal Security Team
xjm of the Drupal Security Team

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