CVE-2022-20683 Denial of service in Cisco IOS XE Software

High 8.6 Published 15 Apr 2022 Updated 6 Nov 2024

Unauthenticated remote attackers can cause a denial of service on Cisco Catalyst 9800 wireless controllers by sending crafted packets.

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-2022-20683?

CVE-2022-20683 is a high-severity denial of service vulnerability in Cisco Ios Xe, published on 15 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the Application Visibility and Control (AVC-FNF) feature of Cisco IOS XE Software for Cisco Catalyst 9800 Series Wireless Controllers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient packet verification for traffic inspected by the AVC feature. An attacker could exploit this vulnerability by sending crafted packets from the wired network to a wireless client, resulting in the crafted packets being processed by the wireless controller. A successful exploit could allow the attacker to cause a crash and reload of the affected device, resulting in a DoS condition.

Weakness: CWE-787, CWE-124

Which versions are affected by CVE-2022-20683?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2022-20683?

No fix has been published for CVE-2022-20683 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-2022-20683 being exploited?

There is no known exploitation of CVE-2022-20683 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-4p4h-xvff-9p66.