CVE-2020-3399: Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family CAPWAP Denial of Service Vulnerability
First published: Thu Sep 24 2020(Updated: )
A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Software for Cisco Catalyst 9800 Series Wireless Controllers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition of an affected device. The vulnerability is due to insufficient input validation during CAPWAP packet processing. An attacker could exploit this vulnerability by sending a crafted CAPWAP packet to an affected device, resulting in a buffer over-read. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a DoS condition on the affected device.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XE | =16.12 | |
| Cisco IOS XE | =16.12.1s | |
| Cisco IOS XE | =16.12.2 | |
| 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 CVE-2020-3399?
CVE-2020-3399 is a vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Software for Cisco Catalyst 9800 Series Wireless Controllers, which could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition of an affected device.
How severe is CVE-2020-3399?
CVE-2020-3399 has a severity rating of 8.6 (High).
Which software versions are affected by CVE-2020-3399?
Cisco IOS XE Software versions 16.12, 16.12.1s, and 16.12.2 are affected by CVE-2020-3399.
How can an attacker exploit CVE-2020-3399?
An unauthenticated remote attacker can exploit CVE-2020-3399 by sending specially crafted CAPWAP packets to the vulnerable device, resulting in a denial of service (DoS) condition.
Is there a fix available for CVE-2020-3399?
Yes, Cisco has released a software update to address the vulnerability. It is recommended to update to the patched versions of the software.
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- canonical/cisco ios xe
- version/cisco ios xe/16.12
- version/cisco ios xe/16.12.1s
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- canonical/cisco catalyst 9800-40
- canonical/cisco catalyst 9800-80
- canonical/cisco catalyst 9800-cl
- canonical/cisco catalyst 9800-l
- canonical/cisco catalyst 9800-l-c
- canonical/cisco catalyst 9800-l-f