Input validation error in Cisco IOS XE - CVE-2020-3221
Published: June 5, 2020
Vulnerability identifier: #VU28764
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-3221
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper validation of parameters in a Flexible NetFlow Version 9 record. A remote attacker can send a specially crafted Flexible NetFlow Version 9 packet to the Control and Provisioning of Wireless Access Points (CAPWAP) data port of an affected device and perform a denial of service (DoS) attack.
This vulnerability affects the following products if they are running affected release of Cisco IOS XE Software:
- Cisco Catalyst 9800 Series Wireless Controllers
Affected software
Cisco IOS XE
How to mitigate CVE-2020-3221
Install updates from vendor's website.
Cisco IOS XE - addressed in versions Gibraltar 16.11.1a, Gibraltar 16.11.1b, Gibraltar 16.11.1c, Gibraltar 16.11.1s, Gibraltar 16.12.1a, Gibraltar 16.12.1b, Gibraltar 16.12.1c, Gibraltar 16.12.1d, Gibraltar 16.12.1e, Gibraltar 16.12.1s