CVE-2022-20683 : Security Advisory and Response
Learn about CVE-2022-20683, a vulnerability in Cisco IOS XE Software affecting Catalyst 9800 Series Wireless Controllers, allowing remote attackers to cause a denial of service condition.
A vulnerability in the Application Visibility and Control (AVC-FNF) feature of Cisco IOS XE Software for Cisco Catalyst 9800 Series Wireless Controllers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
Understanding CVE-2022-20683
This vulnerability in Cisco IOS XE Software impacts the Application Visibility and Control (AVC-FNF) feature for Cisco Catalyst 9800 Series Wireless Controllers.
What is CVE-2022-20683?
CVE-2022-20683 is a security flaw that enables a remote attacker to trigger a DoS condition on an affected device by exploiting insufficient packet verification in the AVC feature.
The Impact of CVE-2022-20683
An unauthenticated attacker could send crafted packets to a wireless client from the wired network, leading to a crash and reload of the affected device, resulting in a DoS situation.
Technical Details of CVE-2022-20683
This section covers the specifics of the vulnerability.
Vulnerability Description
The vulnerability arises due to insufficient packet verification in the AVC feature, allowing attackers to send crafted packets to wireless clients, causing a crash and reload of the device.
Affected Systems and Versions
The vulnerability affects Cisco IOS XE Software for Cisco Catalyst 9800 Series Wireless Controllers.
Exploitation Mechanism
Attackers exploit this vulnerability by sending specially crafted packets from the wired network to wireless clients, triggering a crash and reload scenario on the affected device.
Mitigation and Prevention
Understanding how to mitigate and prevent this vulnerability is essential.
Immediate Steps to Take
Cisco recommends installing the necessary updates and patches as soon as possible to prevent exploitation by unauthorized individuals.
Long-Term Security Practices
Regular security audits, network monitoring, and access control measures can enhance overall security posture.
Patching and Updates
Stay informed about security advisories and apply patches promptly to protect systems from potential threats.