Buffer Underwrite ('Buffer Underflow') in Cisco Systems, Inc products - CVE-2022-20683

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Main Vulnerability Database Vulnerabilities #VU62322

Buffer Underwrite ('Buffer Underflow') in Cisco Systems, Inc products - CVE-2022-20683

Published: April 14, 2022


Vulnerability identifier: #VU62322
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-2022-20683
CWE-ID: CWE-124
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 insufficient packet verification for traffic inspected in the Application Visibility and Control (AVC-FNF) feature . A remote attacker can send a specially crafted packet, trigger memory corruption and cause a denial of service condition on the target system.


Affected software

Catalyst 9800 Series Wireless Controllers
Catalyst 9800-CL Wireless Controllers for Cloud
Cisco IOS XE

How to mitigate CVE-2022-20683

Install updates from vendor's website.

Cisco IOS XE - addressed in versions Bengaluru-17.5.1, Bengaluru-17.6.1, Gibraltar-16.12.7, 16.12(6.34), 16.12.7, 17.3(2.19), 17.3.3, 17.3.4, 17.3.4c, 17.3.4a, 17.3.4 b, 17.3.5, 17.3.5a, 17.5(0.171), 17.5.1, 17.5.1a, 17.6(0.43), 17.6.1, 17.6.1a, 17.6.2, 17.6.3, 17.7.1, 17.7.1a

External References

Related Security Bulletins