QID 730202

Date Published: 2021-09-20

QID 730202: Drupal Core Access Bypass Vulnerability (SA-CORE-2021-008)

Drupal is a free and open source content management framework written in PHP and distributed under the GNU General Public License.

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.

Affected Versions:
Drupal 8.9.x, prior to Drupal 8.9.19.
Drupal 9.1.x, prior to Drupal 9.1.13.
Drupal 9.2.x, prior to Drupal 9.2.6.

QID Detection Logic:
This QID checks for vulnerable version of Drupal installed on the target via a version based check.

Successful exploitation of the vulnerability may allow an attacker to upload files that bypass the file validation process implemented by modules on the site.

CVSS V3 rated as High - 7.5 severity.

CVSS V2 rated as Medium - 5 severity.

Solution

Vendor has released patch, Customers are advised to update to latest drupal version. For more information refer to Drupal security advisory SA-CORE-2021-008

Workaround:
This vulnerability is mitigated by three factors:
The JSON:API or REST File upload modules must be enabled on the site.
An attacker must have access to a file upload via JSON:API or REST.
The site must employ a file validation module.

Vendor References

SA-CORE-2021-008 - www.drupal.org/sa-core-2021-008

CVEs related to QID 730202

CVE-2020-13675 |

Software Advisories

Advisory ID	Software	Component	Link
SA-CORE-2021-008			www.drupal.org/sa-core-2021-008

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