Over 100 Lenovo Laptops Affected by Trio of UEFI Vulnerabilities

Lenovo’s support division has published an advisory that outlines three vulnerabilities affecting its laptop computers.

Lenovo’s support division has published an advisory that outlines three vulnerabilities affecting its laptop computers. All of them could allow an attacker to gain elevated privileges by one means or another. Over 100 Lenovo laptop models are affected by these vulnerabilities, which ESET researchers first discovered. Thankfully, Lenovo says it has system firmware updates ready or on the way to mitigate these new security issues.

Three CVE identifier codes and descriptions were shared by Lenovo, setting out the potential for mischief if left unpatched:

CVE identifier

Description

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.

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