#VU46771 Improper access control in Drupal - CVE-2020-13670

Vulnerability identifier: #VU46771

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-13670

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Drupal
Web applications / CMS

Vendor: Drupal

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted information.

The vulnerability exists due to improper access restrictions within the File module when displacing file metadata. A remote attacker can guess file identifier and view potentially sensitive information.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Drupal: 8.0 - 8.0.6, 8.1.0 beta1 - 8.1.10, 8.2.0 rc1 - 8.2.8, 8.3.0 alpha1 - 8.3.9, 8.4.0 rc1 - 8.4.8, 8.5.0 alpha1 - 8.5.15, 8.6.0 alpha1 - 8.6.18, 8.7.0 rc1 - 8.7.14, 8.8.0 rc1 - 8.8.9, 8.9.0 beta1 - 8.9.5, 9.0.0 alpha1 - 9.0.5

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External links
https://www.drupal.org/sa-core-2020-011

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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.