#VU23682 Arbitrary file upload in Drupal

Vulnerability identifier: #VU23682

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: N/A

CWE-ID: CWE-434

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Drupal
Web applications / CMS

Vendor: Drupal

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to usage of vulnerable Archive_Tar library. If Drupal is configured to allow .tar, .tar.gz, .bz2 or .tlz file uploads, a remote attacker can upload and execute arbitrary PHP code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Drupal: 7.0 - 7.68, 8.7.0 alpha1 - 8.7.10, 8.8.0 beta1 - 8.8.0

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External links
https://www.drupal.org/sa-core-2019-012

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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.