#VU17233 Security restrictions bypass in Drupal - CVE-2019-6338

Vulnerability identifier: #VU17233

Vulnerability risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-6338

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Drupal
Web applications / CMS

Vendor: Drupal

Description

The vulnerability allows a remote authenticated attacker to bypass security restrictions on the system.

The vulnerability exists in the Drupal core PEAR Archive_Tar library due to an unsafe object deserialization condition. A remote attacker can submit a specially crafted tar file to bypass security restrictions on the system and conduct further attacks.

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-2019-001

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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