CVE-2021-1367 : Vulnerability Insights and Analysis

A vulnerability in the Protocol Independent Multicast (PIM) feature of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This CVE was published on February 24, 2021.

Understanding CVE-2021-1367

This section will delve into the details of CVE-2021-1367, its impact, technical details, and mitigation strategies.

What is CVE-2021-1367?

CVE-2021-1367 is a vulnerability in Cisco NX-OS Software's Protocol Independent Multicast feature that enables an attacker to trigger a DoS attack through a crafted PIM packet.

The Impact of CVE-2021-1367

The vulnerability's impact includes the potential for an attacker to cause a traffic loop on the affected device, resulting in a denial of service.

Technical Details of CVE-2021-1367

Let's explore the technical aspects of this vulnerability.

Vulnerability Description

Insufficient input validation in the PIM feature of Cisco NX-OS Software allows unauthenticated adjacent attackers to exploit the system.

Affected Systems and Versions

The vulnerability affects Cisco NX-OS Software; all versions are susceptible to exploitation.

Exploitation Mechanism

Exploiting the vulnerability involves sending a specifically crafted PIM packet to the target device, initiating a traffic loop and leading to a DoS scenario.

Mitigation and Prevention

Discover the steps to mitigate the risk posed by CVE-2021-1367.

Immediate Steps to Take

Immediately update the affected systems and apply relevant patches provided by Cisco.

Long-Term Security Practices

Incorporate network segmentation and access controls to enhance security against potential exploits.

Patching and Updates

Regularly monitor security advisories from Cisco and promptly install patches and updates to safeguard against known vulnerabilities.