CVE-2021-1590 : What You Need to Know
Discover the details of CVE-2021-1590, a vulnerability in Cisco NX-OS Software that allows unauthenticated attackers to disrupt the login process, potentially causing a denial of service (DoS) situation. Learn about the impact, affected systems, and mitigation steps.
A vulnerability in the system login block-for command of Cisco NX-OS Software could enable an unauthenticated remote attacker to trigger a denial of service (DoS) attack by causing a login process to restart unexpectedly. This logic error occurs during the implementation of the system login block-for command when detecting and responding to an attack.
Understanding CVE-2021-1590
This section delves into the details regarding the CVE-2021-1590 vulnerability in Cisco NX-OS Software.
What is CVE-2021-1590?
The CVE-2021-1590 vulnerability pertains to a flaw in the system login block-for command of Cisco NX-OS Software. It allows unauthorized remote attackers to disrupt the login process, potentially leading to a DoS situation.
The Impact of CVE-2021-1590
A successful exploit of CVE-2021-1590 could result in a delay during authentication to the affected device, as it triggers the reload of the login process.
Technical Details of CVE-2021-1590
In this section, the technical aspects of the CVE-2021-1590 vulnerability are discussed.
Vulnerability Description
The vulnerability arises from a logic error in the implementation of the system login block-for command, enabling attackers to conduct a brute-force login attack against vulnerable devices.
Affected Systems and Versions
The affected product is Cisco NX-OS Software with all versions being susceptible to this vulnerability.
Exploitation Mechanism
Exploiting this vulnerability involves performing a brute-force login attack on the targeted device, which can lead to the reload of the login process.
Mitigation and Prevention
This section outlines the steps to mitigate and prevent exploitation of the CVE-2021-1590 vulnerability.
Immediate Steps to Take
It is crucial to apply security updates and patches provided by Cisco to address the vulnerability and prevent potential attacks.
Long-Term Security Practices
Implementing strong password policies, network segmentation, and monitoring login attempts can enhance the overall security posture.
Patching and Updates
Regularly check for security advisories from Cisco and promptly apply recommended patches and updates to safeguard against known vulnerabilities.