Main Vulnerability Database Vulnerabilities #VU67722

Resource management error in Cisco Systems, Inc products - CVE-2022-20847

Published: September 28, 2022

Vulnerability identifier: #VU67722

CSH Severity: Medium

CVSS v4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2022-20847

CWE-ID: CWE-399

Exploitation vector: Adjecent network

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 management of internal resources when handling DHCP messages with enabled DHCP TLV caching feature. A remote attacker can send specially crafted DHCP messages to the device and perform a denial of service (DoS) attack.

Affected software

Cisco Catalyst 9800 Wireless Controller
Cisco 9800 Series Wireless Controllers
Cisco IOS XE

How to mitigate CVE-2022-20847

Install updates from vendor's website.

Cisco IOS XE - addressed in versions 16.12.7, 17.3.5a, 17.6.3, 17.7.1

External References

Related Security Bulletins