CVE-2022-3746 Explained : Impact and Mitigation

This article provides detailed insights into CVE-2022-3746, a potential vulnerability discovered in LCFC BIOS for some Lenovo consumer notebook models.

Understanding CVE-2022-3746

This section delves into the nature of the vulnerability and its impact on affected systems.

What is CVE-2022-3746?

A potential vulnerability was found in LCFC BIOS for certain Lenovo consumer notebook models. An attacker with elevated privileges could exploit this vulnerability to cause abnormal operation of peripherals due to an exposed Embedded Controller (EC) interface.

The Impact of CVE-2022-3746

The vulnerability has a CVSS v3.1 base score of 6.7, categorizing it as a medium severity issue. It poses a high risk to confidentiality, integrity, and availability of affected systems, with privileges required for exploitation being high.

Technical Details of CVE-2022-3746

This section provides a detailed overview of the vulnerability, affected systems, and the exploitation mechanism.

Vulnerability Description

The vulnerability stems from an exposed EC interface in LCFC BIOS for specific Lenovo consumer notebook models, enabling a local attacker with elevated privileges to disrupt peripheral operations.

Affected Systems and Versions

Lenovo consumer notebook models utilizing various versions of LCFC BIOS are susceptible to this vulnerability.

Exploitation Mechanism

An attacker with high privileges can exploit this vulnerability locally to manipulate connected peripherals and cause them to function abnormally.

Mitigation and Prevention

Mitigation strategies and best practices to prevent exploitation of this vulnerability are crucial to maintaining system security.

Immediate Steps to Take

To address CVE-2022-3746, users are advised to update their system firmware to the version specified for their model in the Product Impact section on the Lenovo website.

Long-Term Security Practices

Implementing robust access controls and ensuring timely firmware updates are essential for long-term security against similar vulnerabilities.

Patching and Updates

Regularly applying patches from the vendor, such as firmware updates, is imperative to safeguard systems from known vulnerabilities.