Security bypass in Drupal

1) Privilege escalation

EUVDB-ID: #VU6352

Risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-6919

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain escalated privileges within web application.

The vulnerability exists due to undisclosed error related to RESTful Web Services. A remote authenticated attacker can send a specially crafted PATCH request and gain full access to vulnerable website.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable website.

 

Mitigation

Update to version 8.2.8 or 8.3.1.

Vulnerable software versions

Drupal: 8.2.0 - 8.3.0

External links

http://www.drupal.org/SA-CORE-2017-002

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.