CVE-2020-3206 Cisco IOS XE Software Catalyst 9800 Series Wireless Controllers Denial of Service Vulnerability

Medium 4.7 Published 3 Jun 2020 Updated 15 Nov 2024

An adjacent attacker can terminate valid user connections on Cisco Catalyst 9800 wireless controllers by sending spoofed 802.11w management frames.

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-2020-3206?

CVE-2020-3206 is a medium-severity denial of service vulnerability in Cisco Ios Xe, published on 3 Jun 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in the handling of IEEE 802.11w Protected Management Frames (PMFs) of Cisco Catalyst 9800 Series Wireless Controllers that are running Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to terminate a valid user connection to an affected device. The vulnerability exists because the affected software does not properly validate 802.11w disassociation and deauthentication PMFs that it receives. An attacker could exploit this vulnerability by sending a spoofed 802.11w PMF from a valid, authenticated client on a network adjacent to an affected device. A successful exploit could allow the attacker to terminate a single valid user connection to the affected device.

Weakness: CWE-20

Which versions are affected by CVE-2020-3206?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2020-3206?

No fix has been published for CVE-2020-3206 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-2020-3206 being exploited?

There is no known exploitation of CVE-2020-3206 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-jqh5-88rr-f29q.