Improper Resource Locking in Cisco Systems, Inc products - CVE-2022-20678

Vulnerability identifier: #VU62317

CSH Severity: High

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:Amber

CVE-ID: CVE-2022-20678

CWE-ID: CWE-413

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Cisco IOS XE
Cisco 1000 Series Integrated Services Routers
4000 Series Integrated Services Routers
ASR 1001-X Router
ASR 1002-X Router
Catalyst 8300 Series Routers
Catalyst 8500 Series Routers
Catalyst 8000V Edge Software
Cloud Services Router 1000V Series

Software vendor:
Cisco Systems, Inc

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

The vulnerability exists due to the incorrect handling of certain TCP segments in the AppNav-XE feature. A remote attacker can send a stream of crafted TCP traffic and perform a denial of service (DoS) attack.

Install updates from vendor's website.

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-appnav-xe-dos-j5MXTR4