CVE-2023-20100: Cisco IOS XE Software for Wireless LAN Controllers CAPWAP Join Denial of Service Vulnerability
First published: Thu Mar 23 2023(Updated: )
A vulnerability in the access point (AP) joining process of the Control and Provisioning of Wireless Access Points (CAPWAP) protocol of Cisco IOS XE Software for Wireless LAN Controllers (WLCs) 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 that occurs when certain conditions are met during the AP joining process. An attacker could exploit this vulnerability by adding an AP that is under their control to the network. The attacker then must ensure that the AP successfully joins an affected wireless controller under certain conditions. Additionally, the attacker would need the ability to restart a valid AP that was previously connected to the controller. A successful exploit could allow the attacker to cause the affected device to restart unexpectedly, resulting in a DoS condition.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XE | =17.10.1 | |
| 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 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is CVE-2023-20100?
CVE-2023-20100 is a vulnerability in the access point (AP) joining process of the Control and Provisioning of Wireless Access Points (CAPWAP) protocol of Cisco IOS XE Software for Wireless LAN Controllers (WLCs) that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.
How severe is CVE-2023-20100?
CVE-2023-20100 has a severity rating of 6.8 (medium).
Which software is affected by CVE-2023-20100?
Cisco IOS XE Software for Wireless LAN Controllers (WLCs) version 17.10.1 is affected by CVE-2023-20100.
How can an unauthenticated attacker exploit CVE-2023-20100?
An unauthenticated attacker can exploit CVE-2023-20100 by sending malicious packets to the vulnerable device's Control and Provisioning of Wireless Access Points (CAPWAP) protocol, causing it to enter a denial of service (DoS) condition.
Is Cisco Catalyst 9800 affected by CVE-2023-20100?
No, Cisco Catalyst 9800 is not affected by CVE-2023-20100.
- collector/nvd-index
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/author
- agent/references
- agent/last-modified-date
- agent/title
- agent/weakness
- agent/severity
- agent/tags
- agent/description
- agent/first-publish-date
- agent/event
- vendor/cisco
- canonical/cisco ios xe
- version/cisco ios xe/17.10.1
- 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