CVE-2021-34769: 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 Software | Affected Version | How 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 | =17.3.2a | |
| Cisco IOS XE | =17.4.1 | |
| Cisco IOS XE | =17.5.1 | |
| Cisco Catalyst 9800 | ||
| Cisco Catalyst 9800-40 | ||
| Cisco Catalyst 9800-40 Wireless Controller | ||
| Cisco Catalyst 9800-80 | ||
| Cisco Catalyst 9800-80 Wireless Controller | ||
| Cisco Catalyst 9800-cl | ||
| Cisco Catalyst 9800-l | ||
| Cisco Catalyst 9800-l-c | ||
| Cisco Catalyst 9800-l-f | ||
| Cisco Catalyst 9800 Embedded Wireless Controller |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-34769?
The severity of CVE-2021-34769 is high with a severity value of 7.5.
How does CVE-2021-34769 impact Cisco Catalyst 9000 Family Wireless Controllers?
CVE-2021-34769 could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on affected Cisco Catalyst 9000 Family Wireless Controllers.
How can I fix CVE-2021-34769?
To fix CVE-2021-34769, it is recommended to apply the necessary updates provided by Cisco.
Where can I find more information about CVE-2021-34769?
You can find more information about CVE-2021-34769 on the Cisco Security Advisory page.
What is CWE-415 associated with CVE-2021-34769?
CWE-415 is a Common Weakness Enumeration category associated with CVE-2021-34769.
- collector/nvd-index
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/author
- agent/severity
- agent/title
- agent/last-modified-date
- agent/references
- agent/weakness
- agent/tags
- agent/description
- agent/first-publish-date
- agent/event
- vendor/cisco
- canonical/cisco ios xe
- version/cisco ios xe/3.15.1xbs
- version/cisco ios xe/3.15.2xbs
- version/cisco ios xe/17.3.1
- version/cisco ios xe/17.3.2
- version/cisco ios xe/17.3.2a
- version/cisco ios xe/17.4.1
- version/cisco ios xe/17.5.1
- canonical/cisco catalyst 9800
- canonical/cisco catalyst 9800-40
- canonical/cisco catalyst 9800-40 wireless controller
- canonical/cisco catalyst 9800-80
- canonical/cisco catalyst 9800-80 wireless controller
- canonical/cisco catalyst 9800-cl
- canonical/cisco catalyst 9800-l
- canonical/cisco catalyst 9800-l-c
- canonical/cisco catalyst 9800-l-f
- canonical/cisco catalyst 9800 embedded wireless controller