Vulnerability identifier: #VU52455

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-21426

CWE-ID: CWE-20

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 attacker to delete files on the system.

The vulnerability exists due to insufficient validation of stream names within the "lib/Zend/Http/Response/Stream.php". A remote attacker can pass specially crafted input to the application and delete arbitrary files on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

magento-lts: 20.0.0 - 20.0.8, 19.4.0 - 19.4.12

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External links
http://github.com/OpenMage/magento-lts/commit/6b663bbce99d46823bec690fe7a186df2b855620
http://github.com/OpenMage/magento-lts/releases/tag/v19.4.13
http://github.com/OpenMage/magento-lts/releases/tag/v20.0.10

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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.