CVE-2023-20014 Denial of service in Cisco Nexus Dashboard

High 7.5 Published 16 Feb 2023 Updated 2 Aug 2024

Unauthenticated remote attackers can cause denial of service by flooding DNS requests, affecting Cisco Nexus Dashboard devices.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-20014?

CVE-2023-20014 is a high-severity denial of service vulnerability in Cisco Nexus Dashboard, published on 16 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the DNS functionality of Cisco Nexus Dashboard Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to the improper processing of DNS requests. An attacker could exploit this vulnerability by sending a continuous stream of DNS requests to an affected device. A successful exploit could allow the attacker to cause the coredns service to stop working or cause the device to reload, resulting in a DoS condition.

Weakness: CWE-400, CWE-399

Which versions are affected by CVE-2023-20014?

It affects 1 product.

Products include Cisco Nexus Dashboard.

How do I fix CVE-2023-20014?

No fix has been published for CVE-2023-20014 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2023-20014 being exploited?

There is no known exploitation of CVE-2023-20014 in the wild and no public exploit code.

Sources

Also known as GHSA-hw5w-qhp3-88f5.