CVE-2020-3221: Cisco IOS XE Software Flexible NetFlow Version 9 Denial of Service Vulnerability
First published: Wed Jun 03 2020(Updated: )
A vulnerability in the Flexible NetFlow Version 9 packet processor 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 on an affected device. The vulnerability is due to improper validation of parameters in a Flexible NetFlow Version 9 record. An attacker could exploit this vulnerability by sending a malformed Flexible NetFlow Version 9 packet to the Control and Provisioning of Wireless Access Points (CAPWAP) data port of an affected device. An exploit could allow the attacker to trigger an infinite loop, resulting in a process crash that would cause a reload of the device.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XE | =16.10.1 | |
| Cisco IOS XE | =16.10.1a | |
| Cisco IOS XE | =16.10.1b | |
| Cisco IOS XE | =16.10.1e | |
| Cisco IOS XE | =16.10.1s | |
| Cisco IOS XE | =16.10.2 | |
| Cisco IOS XE | =16.11.1 | |
| Cisco IOS XE | =16.11.1a | |
| Cisco IOS XE | =16.11.1b | |
| Cisco IOS XE | =16.11.1c | |
| Cisco IOS XE | =16.11.1s | |
| Cisco IOS XE | =16.12.1 | |
| Cisco IOS XE | =16.12.1a | |
| Cisco IOS XE | =16.12.1c | |
| Cisco IOS XE | =16.12.1s | |
| Cisco IOS XE | =16.12.1t | |
| 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-2020-3221?
CVE-2020-3221 is a vulnerability in the Flexible NetFlow Version 9 packet processor of Cisco IOS XE Software for Cisco Catalyst 9800 Series Wireless Controllers that could allow a remote attacker to cause a denial of service (DoS) condition.
How does CVE-2020-3221 impact Cisco IOS XE Software?
CVE-2020-3221 could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
What is the severity of CVE-2020-3221?
CVE-2020-3221 has a severity rating of 8.6 (High).
How can I fix CVE-2020-3221?
Apply the necessary security patches provided by Cisco to fix CVE-2020-3221.
Where can I find more information about CVE-2020-3221?
You can find more information about CVE-2020-3221 on the Cisco Security Advisory page: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-fnfv9-dos-HND6Fc9u
- collector/nvd-index
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/title
- agent/weakness
- agent/author
- agent/severity
- agent/remedy
- agent/references
- agent/last-modified-date
- agent/softwarecombine
- agent/tags
- agent/first-publish-date
- agent/event
- agent/description
- vendor/cisco
- canonical/cisco ios xe
- version/cisco ios xe/16.10.1
- version/cisco ios xe/16.10.1a
- version/cisco ios xe/16.10.1b
- version/cisco ios xe/16.10.1e
- version/cisco ios xe/16.10.1s
- version/cisco ios xe/16.10.2
- version/cisco ios xe/16.11.1
- version/cisco ios xe/16.11.1a
- version/cisco ios xe/16.11.1b
- version/cisco ios xe/16.11.1c
- version/cisco ios xe/16.11.1s
- version/cisco ios xe/16.12.1
- version/cisco ios xe/16.12.1a
- version/cisco ios xe/16.12.1c
- version/cisco ios xe/16.12.1s
- version/cisco ios xe/16.12.1t
- 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