CVE-2021-3970 : What You Need to Know

A potential vulnerability in LenovoVariable SMI Handler due to insufficient validation in some Lenovo Notebook models BIOS may allow an attacker with local access and elevated privileges to execute arbitrary code.

Understanding CVE-2021-3970

This CVE refers to a vulnerability in Lenovo Notebook BIOS that could be exploited by an attacker with local access and elevated privileges.

What is CVE-2021-3970?

The CVE-2021-3970 vulnerability is a result of insufficient validation in the LenovoVariable SMI Handler in certain Lenovo Notebook models' BIOS.

The Impact of CVE-2021-3970

The impact of this vulnerability could allow a local attacker with elevated privileges to execute arbitrary code on the affected system.

Technical Details of CVE-2021-3970

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from insufficient validation in LenovoVariable SMI Handler, which can be exploited by attackers.

Affected Systems and Versions

Lenovo Notebook BIOS in various versions is affected by this vulnerability.

Exploitation Mechanism

An attacker with local access and elevated privileges could exploit this vulnerability to execute arbitrary code on the targeted system.

Mitigation and Prevention

Learn how to mitigate and prevent the exploitation of CVE-2021-3970.

Immediate Steps to Take

It is recommended to update the system firmware to the version mentioned in the Product Impact section of Lenovo's advisory LEN-73440.

Long-Term Security Practices

Implement robust security practices to prevent similar vulnerabilities in the future.

Patching and Updates

Regularly apply security patches and updates to ensure the system's security.