CVE-2022-20848 Denial of service in Cisco IOS XE Software

High 8.6 Published 30 Sep 2022 Updated 1 Nov 2024

Remote attackers can cause denial of service on Cisco Catalyst 9100 Access Points by sending malicious UDP datagrams, requiring a software patch.

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-2022-20848?

CVE-2022-20848 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 UDP processing functionality of Cisco IOS XE Software for Embedded Wireless Controllers on Catalyst 9100 Series Access Points could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. This vulnerability is due to the improper processing of UDP datagrams. An attacker could exploit this vulnerability by sending malicious UDP datagrams 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-2022-20848?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2022-20848?

No fix has been published for CVE-2022-20848 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-2022-20848 being exploited?

There is no known exploitation of CVE-2022-20848 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-c26m-p2mq-4vrw.