Vulnerability identifier: #VU54932

Vulnerability risk: Medium

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:U/RC:C]

CVE-ID: CVE-2021-21818

CWE-ID: CWE-259

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 attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to presence of hard-coded password in the Zebra IP Routing Manager functionality. A remote unauthenticated attacker can send a specially crafted network request and cause a denial of service condition on the target 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-2021-1283

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