CVE-2021-1615 : What You Need to Know

A vulnerability in the packet processing functionality of Cisco Embedded Wireless Controller (EWC) Software for Catalyst Access Points (APs) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected AP.

Understanding CVE-2021-1615

This CVE refers to a security flaw in Cisco Embedded Wireless Controller Software for Catalyst Access Points that could lead to a denial of service (DoS) attack.

What is CVE-2021-1615?

The vulnerability arises from insufficient buffer allocation in the packet processing functionality, potentially triggered by crafted traffic from a remote, unauthenticated attacker.

The Impact of CVE-2021-1615

Successful exploitation could deplete resources on an affected AP, resulting in a DoS condition affecting both the AP and client traffic passing through it.

Technical Details of CVE-2021-1615

This section provides insight into the specifics of the CVE.

Vulnerability Description

The vulnerability in Cisco Embedded Wireless Controller Software for Catalyst Access Points can be exploited through crafted traffic, causing a DoS condition due to inadequate buffer allocation.

Affected Systems and Versions

The affected product is Cisco IOS XE Software with all versions susceptible to the vulnerability.

Exploitation Mechanism

An unauthenticated, remote attacker can exploit the flaw by sending malicious traffic to the targeted device, leading to resource exhaustion and subsequent DoS scenarios.

Mitigation and Prevention

Here are essential steps to mitigate and prevent potential exploitation of CVE-2021-1615.

Immediate Steps to Take

Apply the recommended patches or updates provided by Cisco to address this vulnerability.
Monitor network traffic for any signs of malicious activity targeting access points.
Implement network segmentation to limit the impact of potential DoS attacks.

Long-Term Security Practices

Regularly update and patch all network devices to prevent known vulnerabilities from being exploited.
Conduct security training for IT staff to enhance awareness of potential threats and mitigation strategies.

Patching and Updates

Refer to the Cisco Security Advisory linked below for detailed information on patches and updates to resolve the CVE-2021-1615 vulnerability.