high
8.6
CWE
415
Advisory Published
Updated

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

First published: Thu 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.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
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

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Reference Links

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.

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