Drupal security update for Symfony library

1) Support for legacy HTTP methods

EUVDB-ID: #VU14165

Risk: Low

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-14773

CWE-ID: CWE-749 - Exposed Dangerous Method or Function

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to Symfony HttpFoundation component includes support for legacy Microsoft IIS headers X-Original-URL and X-Rewrite-URL. A remote attacker can send a specially crafted HTTP request to the vulnerable application requesting one URL but have Symphony return a different one. An attacker can abuse X-Original-URL and X-Rewrite-URL headers to access otherwise restricted functionality and bypass restrictions on higher level caches and web servers.

Mitigation

Update Drupal to version 8.5.6.

Vulnerable software versions

Drupal: 8.0.0 - 8.5.5

External links

http://www.drupal.org/SA-CORE-2018-005

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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