CVE-2021-1387 : Vulnerability Insights and Analysis
Learn about CVE-2021-1387, a critical vulnerability in Cisco NX-OS Software that enables remote attackers to trigger a denial of service condition on affected devices. Find out the impact, technical details, and mitigation strategies.
A vulnerability in the network stack of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service condition on affected devices. This article provides an overview, impact, technical details, and mitigation strategies related to CVE-2021-1387.
Understanding CVE-2021-1387
This section offers insight into the nature of the vulnerability, its impact, and potential exploitation scenarios.
What is CVE-2021-1387?
The vulnerability in Cisco NX-OS Software allows malicious actors to trigger a denial of service state on affected devices by exploiting a flaw in how the software handles specific IPv6 packets.
The Impact of CVE-2021-1387
The exploitation of this vulnerability could lead to a network stack overload, disrupting essential operations like control plane and management protocols, resulting in a denial of service condition on the device.
Technical Details of CVE-2021-1387
Explore the specifics of the vulnerability to understand affected systems, exploitation mechanisms, and more.
Vulnerability Description
The flaw stems from the improper resource handling when processing certain IPv6 packets, enabling attackers to flood devices with crafted packets and exhaust network buffers, causing a DoS condition.
Affected Systems and Versions
Cisco NX-OS Software is affected by this vulnerability, with specific details provided in the references.
Exploitation Mechanism
Threat actors can exploit CVE-2021-1387 by sending malicious IPv6 packets to vulnerable devices, depleting network buffers and disrupting normal device operations.
Mitigation and Prevention
Discover immediate steps and best practices to mitigate the risks posed by this vulnerability.
Immediate Steps to Take
To address CVE-2021-1387, users are advised to implement security updates, network filtering, and monitoring to detect and prevent exploitation attempts.
Long-Term Security Practices
In the long term, organizations should prioritize regular security audits, patch management, and network hardening to fortify their infrastructure against potential threats.
Patching and Updates
Cisco has released security advisories and patches to address this vulnerability. Organizations are urged to apply these updates promptly to safeguard their network infrastructure.