Unchecked Return Value in Cisco Systems, Inc products - CVE-2022-20682

Vulnerability identifier: #VU62321

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-2022-20682

CWE-ID: CWE-252

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to inadequate input validation in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol. A remote attacker can send a specially crafted mDNS query and perform a denial of service (DoS) attack.

Catalyst 9300 Series Switches
Catalyst 9400 Series Switches
Catalyst 9500 Series Switches
Catalyst 9800 Embedded Wireless Controller
Catalyst 9800 Series Wireless Controllers
Catalyst 9800-CL Wireless Controllers for Cloud
Embedded Wireless Controller on Catalyst Access Points
Cisco IOS XE

Install updates from vendor's website.

Cisco IOS XE - addressed in versions Amsterdam-17.3.4, Bengaluru-17.6.1, Gibraltar-16.12.7, Cupertino-17.7.1, Cupertino-17.7.1a, 16.12(6.33), 16.12.7, 17.3(3.4), 17.3.4, 17.3.4c, 17.3.4a, 17.3.4 b, 17.3.5, 17.3.5a, 17.6(0.88), 17.6.1, 17.6.1a, 17.6.2, 17.6.3, 17.7(0.2), 17.7.1, 17.7.1a

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-c9800-capwap-mdns-6PSn7gKU

• Denial of service in Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family