CVE-2018-0441 Cisco IOS Access Points Software 802.11r Fast Transition Denial of Service Vulnerability

High 7.4 Published 17 Oct 2018 Updated 26 Nov 2024

An adjacent attacker can cause a denial of service on Cisco IOS Access Points by exploiting a timer corruption in the 802.11r Fast Transition feature.

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-2018-0441?

CVE-2018-0441 is a high-severity denial of service vulnerability in Cisco Aironet Access Point Software, published on 17 Oct 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in the 802.11r Fast Transition feature set of Cisco IOS 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 a corruption of certain timer mechanisms triggered by specific roaming events. This corruption will eventually cause a timer crash. An attacker could exploit this vulnerability by sending malicious reassociation events multiple times to the same AP in a short period of time, causing a DoS condition on the affected AP.

Weakness: CWE-400

Which versions are affected by CVE-2018-0441?

It affects 1 product.

Products include Cisco Access Points.

How do I fix CVE-2018-0441?

No fix has been published for CVE-2018-0441 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-2018-0441 being exploited?

There is no known exploitation of CVE-2018-0441 in the wild and no public exploit code.

Sources

Also known as GHSA-rv57-79g9-2rpq.