#VU17234 Input validation error in Drupal - CVE-2019-6339

Vulnerability identifier: #VU17234

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: CVE-2019-6339

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Drupal
Web applications / CMS

Vendor: Drupal

Description

The vulnerability allows a remote attacker to execute arbitrary code on the system.

The vulnerability exists in PHP's built-in phar stream wrapper when performing file operations on an untrusted phar:// URI. Some Drupal code (core, contrib, and custom) due to insufficient validation of user-supplied input. A remote attacker can submit specially crafted input and execute arbitrary PHP code.

Mitigation
The vulnerability has been fixed in the versions 7.62, 8.5.9, 8.6.6.

Vulnerable software versions

Drupal: 7.0 - 7.61, 8.5.0 - 8.5.8, 8.6.0 - 8.6.5

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External links
https://www.drupal.org/sa-core-2019-002

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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.