CVE-2021-3718 : Security Advisory and Response

A denial of service vulnerability in various ThinkPad BIOS versions by Lenovo can cause system crashes when the Enhanced Biometrics setting is enabled.

Understanding CVE-2021-3718

This CVE details a denial of service vulnerability impacting certain ThinkPad BIOS versions distributed by Lenovo.

What is CVE-2021-3718?

CVE-2021-3718 involves a flaw that can lead to system crashes when a specific BIOS setting is activated in affected ThinkPad models.

The Impact of CVE-2021-3718

The vulnerability has a CVSS base score of 4.3, with a medium severity rating due to its potential to disrupt system availability.

Technical Details of CVE-2021-3718

This section covers key technical aspects of the CVE.

Vulnerability Description

The flaw triggers system crashes when the Enhanced Biometrics setting is turned on in ThinkPad BIOS.

Affected Systems and Versions

Various versions of ThinkPad BIOS are impacted by this vulnerability.

Exploitation Mechanism

Users require physical access to exploit the flaw, resulting in a low attack complexity scenario requiring user interaction.

Mitigation and Prevention

Discover the recommended steps to mitigate the CVE's risks.

Immediate Steps to Take

Update the system firmware to the version specified for your model in the Lenovo advisory LEN-72619.

Long-Term Security Practices

Regularly check for firmware updates and security advisories from Lenovo to address potential vulnerabilities.

Patching and Updates

Stay proactive in applying patches and updates provided by Lenovo to enhance system security.