CVE-2022-20856: Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family CAPWAP Mobility Denial of Service Vulnerability
First published: Fri Sep 30 2022(Updated: )
A vulnerability in the processing of Control and Provisioning of Wireless Access Points (CAPWAP) Mobility messages in 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 a logic error and improper management of resources related to the handling of CAPWAP Mobility messages. An attacker could exploit this vulnerability by sending crafted CAPWAP Mobility packets to an affected device. A successful exploit could allow the attacker to exhaust resources on the affected device. This would cause the device to reload, resulting in a DoS condition.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XE | =17.3.4c | |
| 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
Frequently Asked Questions
What is the severity of CVE-2022-20856?
The severity of CVE-2022-20856 is high with a severity value of 7.5.
How does CVE-2022-20856 affect Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family?
CVE-2022-20856 can cause a denial of service (DoS) condition on affected devices running Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family.
Is Cisco Catalyst 9800 affected by CVE-2022-20856?
No, Cisco Catalyst 9800 is not affected by CVE-2022-20856.
How can I fix CVE-2022-20856?
Cisco has released a security advisory with mitigation details for CVE-2022-20856. Please refer to the advisory for instructions on how to address the vulnerability.
Where can I find more information about CVE-2022-20856?
You can find more information about CVE-2022-20856 in the Cisco Security Advisory available at the provided reference link.
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- canonical/cisco catalyst 9800
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- canonical/cisco catalyst 9800-l-c
- canonical/cisco catalyst 9800-l-f