What is the vulnerability ID for this vulnerability?

The vulnerability ID is CVE-2022-20847.

What is the severity of CVE-2022-20847?

CVE-2022-20847 has a severity value of 7.5, which is considered high.

What software is affected by CVE-2022-20847?

Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family versions 17.3.3 is affected by CVE-2022-20847.

How can an attacker exploit CVE-2022-20847?

An attacker can exploit CVE-2022-20847 by sending specially crafted DHCP messages to the affected system, causing a denial of service (DoS) condition.

Is there a fix available for CVE-2022-20847?

Yes, Cisco has released a security advisory that provides information on how to mitigate this vulnerability.

Vulnerability/
CVE-2022-20847

high

8.6

CWE

399

30/9/2022

27/6/2023

CVE-2022-20847

First published: Fri Sep 30 2022(Updated: )

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.

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco IOS XE	=17.3.3
Cisco Catalyst 9800
Cisco Catalyst 9800-40
Cisco Catalyst 9800-80
Cisco Catalyst 9800-cl
Cisco Catalyst 9800-l
Cisco Catalyst 9800-l-c
Cisco Catalyst 9800-l-f

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Reference Links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-dhcp-dos-76pCjPxK

Frequently Asked Questions

What is the vulnerability ID for this vulnerability?
The vulnerability ID is CVE-2022-20847.
What is the severity of CVE-2022-20847?
CVE-2022-20847 has a severity value of 7.5, which is considered high.
What software is affected by CVE-2022-20847?
Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family versions 17.3.3 is affected by CVE-2022-20847.
How can an attacker exploit CVE-2022-20847?
An attacker can exploit CVE-2022-20847 by sending specially crafted DHCP messages to the affected system, causing a denial of service (DoS) condition.
Is there a fix available for CVE-2022-20847?
Yes, Cisco has released a security advisory that provides information on how to mitigate this vulnerability.

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