CVE-2023-20202 Denial of service in Cisco IOS XE Software

Medium 6.1 Published 27 Sep 2023 Updated 21 Nov 2024

An unauthenticated adjacent attacker can cause a denial of service by exhausting memory in the Wireless Network Control daemon, requiring a device reload.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-20202?

CVE-2023-20202 is a medium-severity denial of service vulnerability in Cisco Ios Xe, published on 27 Sep 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in the Wireless Network Control daemon (wncd) of Cisco IOS XE Software for Wireless LAN Controllers could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. This vulnerability is due to improper memory management. An attacker could exploit this vulnerability by sending a series of network requests to an affected device. A successful exploit could allow the attacker to cause the wncd process to consume available memory and eventually cause the device to reload, resulting in a DoS condition.

Weakness: CWE-789

Which versions are affected by CVE-2023-20202?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2023-20202?

No fix has been published for CVE-2023-20202 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-2023-20202 being exploited?

There is no known exploitation of CVE-2023-20202 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-9m3w-2ggj-2vqw.