Vulnerability identifier: #VU54935

Vulnerability risk: Low

CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:U/RC:C]

CVE-ID: CVE-2021-21819

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
DIR-3040
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: D-Link

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 the Libcli Test Environment functionality. A remote administrator can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

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

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

DIR-3040: 1.13 B03

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External links
http://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1284

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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. However, proof of concept for this vulnerability is available.