Lenovo Notebook BIOS Vulnerabilities

Summary Description:

The following vulnerabilities were reported in Lenovo Notebook BIOS.

CVE-2021-3970: A potential vulnerability in LenovoVariable SMI Handler due to insufficient validation in some Lenovo Notebook models may allow an attacker with local access and elevated privileges to execute arbitrary code.

CVE-2021-3971: A potential vulnerability by a driver used during older manufacturing processes on some consumer Lenovo Notebook devices that was mistakenly included in the BIOS image could allow an attacker with elevated privileges to modify firmware protection region by modifying an NVRAM variable.

CVE-2021-3972: A potential vulnerability by a driver used during manufacturing process on some consumer Lenovo Notebook devices that was mistakenly not deactivated may allow an attacker with elevated privileges to modify secure boot setting by modifying an NVRAM variable.

Mitigation Strategy for Customers (what you should do to protect yourself):

Update system firmware to the version (or newer) indicated for your model in the Product Impact section.

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Lenovo Notebook BIOS Vulnerabilities - Lenovo Support RO

support.lenovo.com