NULL pointer dereference in Cisco Systems, Inc products - CVE-2021-34768
Published: September 24, 2021
Vulnerability identifier: #VU56854
CSH Severity: Medium
CVSSv4.0: 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/E:U/U:Green
CVE-ID: CVE-2021-34768
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Cisco IOS XE
Catalyst 9800 Embedded Wireless Controller
Cisco Catalyst 9800 Series Wireless Controllers
Catalyst 9800-CL Wireless Controllers for Cloud
Cisco Embedded Wireless Controller Software for Catalyst Access Points
Cisco IOS XE
Catalyst 9800 Embedded Wireless Controller
Cisco Catalyst 9800 Series Wireless Controllers
Catalyst 9800-CL Wireless Controllers for Cloud
Cisco Embedded Wireless Controller Software for Catalyst Access Points
Software vendor:
Cisco Systems, Inc
Cisco Systems, Inc
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.
Remediation
Install updates from vendor's website.