CVE-2020-3494: Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family CAPWAP Denial of Service Vulnerabilities
First published: Thu Sep 24 2020(Updated: )
Multiple vulnerabilities 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, adjacent attacker to cause a denial of service (DoS) condition of an affected device. These vulnerabilities are due to insufficient validation of CAPWAP packets. An attacker could exploit these 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 on the affected device.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XE | =16.12.1 | |
| 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 CVE-2020-3494?
CVE-2020-3494 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.
What is the severity rating of CVE-2020-3494?
The severity rating of CVE-2020-3494 is high with a score of 7.4.
How can an unauthenticated attacker exploit CVE-2020-3494?
An unauthenticated attacker can exploit CVE-2020-3494 by causing a denial of service (DoS) condition on an affected device.
Which software versions are affected by CVE-2020-3494?
Cisco IOS XE Software version 16.12.1 for Cisco Catalyst 9800 Series Wireless Controllers is affected by CVE-2020-3494.
How can I fix CVE-2020-3494?
To fix CVE-2020-3494, it is recommended to upgrade to a fixed version of Cisco IOS XE Software.
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- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/author
- agent/references
- agent/weakness
- agent/title
- agent/last-modified-date
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- agent/first-publish-date
- agent/tags
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- vendor/cisco
- canonical/cisco ios xe
- version/cisco ios xe/16.12.1
- 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