In Lenovo systems, SMM BIOS Write Protection is used to prevent writes to SPI Flash. While this provides sufficient protection, an additional layer of protection is provided by SPI Protected Range Registers (PRx). After resuming from S3 sleep mode in various versions of BIOS for some Lenovo ThinkPad systems, the PRx is not set. This does not impact the SMM BIOS Write Protection, which keeps systems protected.

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Advisories
Source ID Title
EUVD EUVD EUVD-2020-29208 In Lenovo systems, SMM BIOS Write Protection is used to prevent writes to SPI Flash. While this provides sufficient protection, an additional layer of protection is provided by SPI Protected Range Registers (PRx). After resuming from S3 sleep mode in various versions of BIOS for some Lenovo ThinkPad systems, the PRx is not set. This does not impact the SMM BIOS Write Protection, which keeps systems protected.
Fixes

Solution

No action required. Lenovo has updated BIOS for systems in the product impact section to implement this secondary protection, PRx.


Workaround

No workaround given by the vendor.

History

No history.

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: lenovo

Published:

Updated: 2024-09-16T23:16:41.057Z

Reserved: 2020-01-28T00:00:00

Link: CVE-2020-8341

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-09-01T22:15:10.377

Modified: 2024-11-21T05:38:44.680

Link: CVE-2020-8341

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses