Input validation error in Cisco Systems, Inc products - CVE-2023-20100
Published: March 23, 2023
Vulnerability identifier: #VU73985
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-20100
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 a logic error when certain conditions are met during the access point (AP) joining process of the Control and Provisioning of Wireless Access Points (CAPWAP) protocol. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
Affected software
Catalyst 9800 Embedded Wireless Controller
Catalyst 9800 Series Wireless Controllers
Catalyst 9800-CL Wireless Controllers for Cloud
Embedded Wireless Controllers on Catalyst Access Points
Cisco IOS XE
Catalyst 9800 Series Wireless Controllers
Catalyst 9800-CL Wireless Controllers for Cloud
Embedded Wireless Controllers on Catalyst Access Points
Cisco IOS XE
How to mitigate CVE-2023-20100
Install updates from vendor's website.
Cisco IOS XE - addressed in versions Cupertino-17.9.1, 17.3.6, 17.6.4, 17.6.5, 17.9.1w, 17.9.1x, 17.9.1x1, 17.9.1a, 17.9.2, 17.9.2a, 17.9.3, 17.10.1a, 17.10.1b