CVE-2022-3431 Explained : Impact and Mitigation
Learn about CVE-2022-3431, a driver vulnerability in Lenovo Notebook devices enabling unauthorized modification of secure boot settings. Find mitigation steps here.
A driver vulnerability in some consumer Lenovo Notebook devices could allow an attacker to modify secure boot settings, posing a significant risk to system security.
Understanding CVE-2022-3431
This section delves into the details of the CVE-2022-3431 vulnerability, its impact, technical aspects, and mitigation strategies.
What is CVE-2022-3431?
CVE-2022-3431 highlights a potential vulnerability in a driver used during the manufacturing process on specific Lenovo Notebook devices. This oversight could empower an attacker with elevated privileges to alter secure boot settings by modifying an NVRAM variable.
The Impact of CVE-2022-3431
The CVSS V3.1 base score of 6.7 denotes a medium severity level. With a low attack complexity and local attack vector, the vulnerability could result in high impacts on availability, confidentiality, and integrity. Attackers with high privileges could exploit this flaw without user interaction, maintaining the scope unchanged. The vulnerability is classified under CWE-276: Incorrect Default Permissions.
Technical Details of CVE-2022-3431
Let's explore the technical nuances of CVE-2022-3431, including the vulnerability description, affected systems and versions, and the exploitation mechanism.
Vulnerability Description
The driver vulnerability allows attackers with elevated privileges to manipulate secure boot settings through an NVRAM variable on certain Lenovo Notebook devices.
Affected Systems and Versions
The vulnerability affects various versions of the BIOS on consumer Lenovo Notebook devices.
Exploitation Mechanism
Attackers can exploit this vulnerability locally with high privileges, without requiring user interaction, to modify secure boot settings.
Mitigation and Prevention
Here's how you can mitigate the risks associated with CVE-2022-3431 and prevent potential security breaches.
Immediate Steps to Take
It's crucial to update system firmware to the version specified for your model in the product Impact section of LEN-94952 to address the vulnerability.
Long-Term Security Practices
Regularly updating firmware and implementing secure boot configurations are essential practices to enhance system security.
Patching and Updates
Stay informed about security updates from Lenovo to patch vulnerabilities promptly and protect your devices against potential threats.