CVE-2021-1373 : Security Advisory and Response
Discover the details of CVE-2021-1373, a vulnerability in Cisco IOS XE Wireless Controller Software for Catalyst 9000 Family Controllers, allowing remote attackers to trigger a denial of service condition.
A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Wireless Controller Software for the Cisco Catalyst 9000 Family Wireless Controllers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition of an affected device. This vulnerability is due to insufficient validation of CAPWAP packets, enabling an attacker to crash and reload the affected device.
Understanding CVE-2021-1373
This section provides detailed insights into the CVE-2021-1373 vulnerability affecting Cisco IOS XE Wireless Controller Software.
What is CVE-2021-1373?
CVE-2021-1373 is a high-severity vulnerability that allows an unauthenticated, remote attacker to trigger a denial of service (DoS) condition by sending a malformed CAPWAP packet to an affected device.
The Impact of CVE-2021-1373
The impact of this vulnerability is significant, as successful exploitation can result in crashing and reloading the affected device, leading to a denial of service (DoS) situation.
Technical Details of CVE-2021-1373
This section covers the technical aspects of the CVE-2021-1373 vulnerability.
Vulnerability Description
The vulnerability arises from insufficient validation of CAPWAP packets within Cisco IOS XE Wireless Controller Software, allowing attackers to disrupt the normal operation of affected devices.
Affected Systems and Versions
The vulnerability affects Cisco IOS XE Software in versions that are using Cisco Catalyst 9000 Family Wireless Controllers.
Exploitation Mechanism
Attackers can exploit this vulnerability by sending a crafted CAPWAP packet to the targeted device, triggering a crash and reload scenario.
Mitigation and Prevention
To safeguard your systems from CVE-2021-1373, certain mitigation strategies and prevention methods can be implemented.
Immediate Steps to Take
Immediate actions include updating the affected software to the patched version provided by Cisco and monitoring network traffic for any suspicious CAPWAP packets.
Long-Term Security Practices
In the long term, regular software updates, security training for personnel, and network segmentation can enhance overall security posture.
Patching and Updates
Timely installation of security patches released by Cisco is crucial to address the CVE-2021-1373 vulnerability and prevent potential exploitation.