Lenovo Notebook BIOS-haavoittuvuudet

*Trinity* · Apr 19, 2022

Lenovo Notebook BIOS Vulnerabilities

Lenovo Security Advisory: LEN-73440

Potential Impact: Privilege escalation

Severity: Medium

Scope of Impact: Lenovo-specific

CVE Identifier: CVE-2021-3970, CVE-2021-3971, CVE-2021-3972

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.

https://support.lenovo.com/

Lenovo Products (sold in China): https://newsupport.lenovo.com.cn/

IBM-branded System x Legacy Products: https://www.ibm.com/support/fixcentral/

Search for your product by name or machine type.

Click Drivers & Software on the left menu panel.

Click on Manual Update to browse by Component type.

Compare the minimum fix version for your product from the applicable product table below with the latest version posted on the support site.

Lenovo also offers tools to assist with update management as an alternative to the manual steps described above. Refer to the following for additional help:
Click to expand...

Koko artikkeli ja lista malleista jotka kannattaa päivittää. https://support.lenovo.com/us/en/product_security/LEN-73440

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Lenovo Notebook BIOS-haavoittuvuudet

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