Insecure deserialization in Drupal implementation of Phar Stream Wrapper Interceptor

1) Deserialization of untrusted data

EUVDB-ID: #VU18416

Risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-11831

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Exploit availability: No

Description

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

The vulnerability exists due to insecure input validation when processing serialized data passed via phar archives. A remote attacker can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

The vulnerability exists due to inclusion of a third-party software Phar Stream Wrapper Interceptor into Drupal core.

Vulnerable software versions

Drupal: 7.0 - 8.7.0

CPE2.3

• cpe:2.3:a:drupal:drupal:7.0:*:*:*:*:*:*:*
• cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*
• cpe:2.3:a:drupal:drupal:7.3:*:*:*:*:*:*:*
• cpe:2.3:a:drupal:drupal:7.4:*:*:*:*:*:*:*
• cpe:2.3:a:drupal:drupal:7.9:*:*:*:*:*:*:*
• cpe:2.3:a:drupal:drupal:7.10:*:*:*:*:*:*:*

External links

https://www.drupal.org/sa-core-2019-007

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.