CVE-2021-34768: 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 CVE-2021-34768?
CVE-2021-34768 refers to 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.
What is the severity of CVE-2021-34768?
The severity of CVE-2021-34768 is high, with a severity value of 7.5.
How can an unauthenticated, remote attacker exploit CVE-2021-34768?
An unauthenticated, remote attacker can exploit CVE-2021-34768 to cause a denial of service (DoS) condition on an affected device.
Which software versions are affected by CVE-2021-34768?
Cisco IOS XE Software versions 3.15.1xbs, 3.15.2xbs, 17.3.1, 17.3.2, 17.3.2a, 17.4.1, and 17.5.1 are affected by CVE-2021-34768.
How can I fix CVE-2021-34768?
To fix CVE-2021-34768, it is recommended to apply the necessary updates provided by Cisco.
- collector/nvd-index
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/author
- 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