CVE-2022-20682 Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family CAPWAP Denial of Service Vulnerability

High 8.6 Published 15 Apr 2022 Updated 6 Nov 2024

Unauthenticated remote attackers can crash Cisco IOS XE wireless controllers by sending crafted mDNS queries via CAPWAP, causing denial of service.

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-2022-20682?

CVE-2022-20682 is a high-severity 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 Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to inadequate input validation of incoming CAPWAP packets encapsulating multicast DNS (mDNS) queries. An attacker could exploit this vulnerability by connecting to a wireless network and sending a crafted mDNS query, which would flow through and be processed by the wireless controller. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a DoS condition.

Weakness: CWE-476, CWE-690

Which versions are affected by CVE-2022-20682?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2022-20682?

No fix has been published for CVE-2022-20682 yet. Limit exposure of the affected software until one is available.

Is CVE-2022-20682 being exploited?

There is no known exploitation of CVE-2022-20682 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-vmq7-2pqh-rj6g.