CVE-2022-20847 Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family DHCP Processing Denial of Service Vulnerability

High 8.6 Published 30 Sep 2022 Updated 1 Nov 2024

Unauthenticated remote attackers can cause a denial of service by sending malicious DHCP messages to Cisco IOS XE Wireless Controllers.

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-2022-20847?

CVE-2022-20847 is a high-severity denial of service vulnerability in Cisco Ios Xe, published on 30 Sep 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the DHCP processing functionality 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. This vulnerability is due to the improper processing of DHCP messages. An attacker could exploit this vulnerability by sending malicious DHCP messages to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

Weakness: CWE-399

Which versions are affected by CVE-2022-20847?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2022-20847?

No fix has been published for CVE-2022-20847 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-2022-20847 being exploited?

There is no known exploitation of CVE-2022-20847 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-8p52-5f85-cwpc.