Vulnerability identifier: #VU71573

Vulnerability risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-39217

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
magento-lts
Web applications / Modules and components for CMS

Vendor: OPENMAGE

Description

The vulnerability allows a remote user to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation in Custom Layout. A remote administrator can pass specially crafted data to the application and execute arbitrary OS commands on the target system via block methods.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

magento-lts: 20.0.0 - 20.0.18, 19.4.0 - 19.4.21

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External links
http://github.com/OpenMage/magento-lts/security/advisories/GHSA-c9q3-r4rv-mjm7
http://github.com/OpenMage/magento-lts/releases/tag/v20.0.19
http://github.com/OpenMage/magento-lts/releases/tag/v19.4.22

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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