CVE-2021-1565: Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Denial of Service Vulnerabilities

Published Sep 23, 2021

Updated

Multiple vulnerabilities in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Software for Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. These vulnerabilities are due to insufficient validation of CAPWAP packets. An attacker could exploit the vulnerabilities by sending a malformed CAPWAP packet to an affected device. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a DoS condition.

Affected Software

60 affected components

Cisco IOS XE=3.15.1xbs

Cisco IOS XE=3.15.2xbs

Cisco IOS XE=17.3.1

Cisco IOS XE=17.3.2

Cisco IOS XE=17.4.1

Cisco IOS XE=17.5.1

Cisco Embedded Wireless Controller

cisco Catalyst 9300-24p-a

cisco Catalyst 9300-24p-e

cisco Catalyst 9300-24s-a

cisco Catalyst 9300-24s-e

cisco Catalyst 9300-24t-a

cisco Catalyst 9300-24t-e

cisco Catalyst 9300-24u-a

cisco Catalyst 9300-24u-e

Cisco Catalyst 9300-24ux-a

Cisco Catalyst 9300-24ux-e

Cisco Catalyst 9300-48p-a

Cisco Catalyst 9300-48p-e

cisco Catalyst 9300-48s-a

cisco Catalyst 9300-48s-e

cisco Catalyst 9300-48t-a

Cisco Catalyst 9300-48t-e

cisco Catalyst 9300-48u-a

Cisco Catalyst 9300-48u-e

cisco Catalyst 9300-48un-a

cisco Catalyst 9300-48un-e

cisco Catalyst 9300-48uxm-a

cisco Catalyst 9300-48uxm-e

cisco Catalyst 9300L

cisco Catalyst 9300l-24p-4g-a

Cisco Catalyst 9300l-24p-4g-e

cisco Catalyst 9300l-24p-4x-a

cisco Catalyst 9300l-24p-4x-e

Cisco Catalyst 9300l-24t-4g-a

cisco Catalyst 9300l-24t-4g-e

cisco Catalyst 9300l-24t-4x-a

cisco Catalyst 9300l-24t-4x-e

cisco Catalyst 9300l-48p-4g-a

Cisco Catalyst 9300l-48p-4g-e

Cisco Catalyst 9300l-48p-4x-a

Cisco Catalyst 9300l-48p-4x-e

cisco Catalyst 9300l-48t-4g-a

Cisco Catalyst 9300l-48t-4g-e

Cisco Catalyst 9300l-48t-4x-a

cisco Catalyst 9300l-48t-4x-e

cisco Catalyst 9300l Stack

Cisco Catalyst 9400

cisco Catalyst 9400 Supervisor Engine-1

cisco Catalyst 9407r

cisco Catalyst 9410r

Cisco Catalyst 9500

cisco Catalyst 9800 Firmware=17.3

cisco Catalyst 9800 Firmware=17.5.1

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

Event History

Sep 23, 2021

CVE Published

via MITRE·02:30 AM

Data Sourced

via MITRE·02:30 AM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the vulnerability ID?

The vulnerability ID is CVE-2021-1565.

What is the severity of CVE-2021-1565?

The severity of CVE-2021-1565 is high with a CVSS score of 8.6.

What software is affected by CVE-2021-1565?

The Cisco IOS XE Software for Cisco Catalyst 9000 Family Wireless Controllers and the Cisco Catalyst 9800 Firmware are affected.

What is the impact of CVE-2021-1565?

CVE-2021-1565 could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.

How can I fix CVE-2021-1565?

To fix CVE-2021-1565, it is recommended to apply the necessary updates or patches provided by Cisco.

CVE-2021-1565: Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers CAPWAP Denial of Service Vulnerabilities

Affected Software

Event History

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Frequently Asked Questions

What is the vulnerability ID?

What is the severity of CVE-2021-1565?

What software is affected by CVE-2021-1565?

What is the impact of CVE-2021-1565?

How can I fix CVE-2021-1565?

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