CVE-2020-3221
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.
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco ios_xe | 16.10.1, 16.10.1a, 16.10.1b, 16.10.1e, 16.10.1s, 16.10.2, 16.11.1, 16.11.1a, 16.11.1b, 16.11.1c, 16.11.1s, 16.12.1, 16.12.1a, 16.12.1c, 16.12.1s, 16.12.1t | — |
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