CVE-2021-3971

Published: 22/04/2022 Updated: 06/05/2022

CVSS v2 Base Score: 4.6 | Impact Score: 6.4 | Exploitability Score: 3.9

CVSS v3 Base Score: 6.7 | Impact Score: 5.9 | Exploitability Score: 0.8

VMScore: 409

Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

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.

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ESET uncovers vulnerabilities in Lenovo laptops

The Register • Richard Speed • 01 Jan 1970

Get our weekly newsletter Firmware updates incoming in response to UEFI threats

Got a Lenovo laptop? You might need to do a swift bit of patching judging by the latest set of vulnerabilities uncovered by security researchers at ESET. Three vulnerabilities were reported today: CVE-2021-3970, CVE-2021-3971, and CVE-2021-3972. The latter two are particularly embarrassing since they are related to UEFI firmware drivers used in the manufacturing process and can be used to disable SPI flash protections or the UEFI Secure Boot feature. "UEFI threats can be extremely stealthy and d...

CVE-2021-3971

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