CVE-2020-3552 Cisco Aironet Access Points Ethernet Wired Clients Denial of Service Vulnerability

High 7.4 Published 24 Sep 2020 Updated 13 Nov 2024

An adjacent attacker can cause a denial of service on Cisco Aironet Access Points by sending specific Ethernet packets, triggering a null pointer dereference and 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-2020-3552?

CVE-2020-3552 is a high-severity vulnerability in Cisco Aironet Access Point Software, published on 24 Sep 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 Ethernet packet handling of Cisco Aironet Access Points (APs) Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by connecting as a wired client to the Ethernet interface of an affected device and sending a series of specific packets within a short time frame. A successful exploit could allow the attacker to cause a NULL pointer access that results in a reload of the affected device.

Weakness: CWE-476

Which versions are affected by CVE-2020-3552?

It affects 4 products.

Products include Cisco Access Points, Cisco Aironet Access Point Software, Cisco Business Access Points, Cisco Wireless Lan Controller.

How do I fix CVE-2020-3552?

No fix has been published for CVE-2020-3552 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-3552 being exploited?

There is no known exploitation of CVE-2020-3552 in the wild and no public exploit code.

Sources

Also known as GHSA-hr95-cqm5-95mg.