CVE-2020-3221

Cisco IOS XE Software Flexible NetFlow Version 9 Denial of Service Vulnerability

Description

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.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.50%
Vendor Advisory cisco.com
Affected: Cisco Cisco IOS XE Software 16.10.1
Published at:
Updated at:

References

Link Tags
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-fnfv9-dos-HND6Fc9u patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-3221?
CVE-2020-3221 has been scored as a high severity vulnerability.
How to fix CVE-2020-3221?
To fix CVE-2020-3221, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-3221 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-3221 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-3221?
CVE-2020-3221 affects Cisco Cisco IOS XE Software 16.10.1.
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