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.
Metrics
Affected Vendors & Products
Advisories
Source | ID | Title |
---|---|---|
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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.
References
Link | Providers |
---|---|
https://support.lenovo.com/us/en/product_security/LEN-30042 |
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History
No history.

Status: PUBLISHED
Assigner: lenovo
Published:
Updated: 2024-09-16T23:16:41.057Z
Reserved: 2020-01-28T00:00:00
Link: CVE-2020-8341

No data.

Status : Modified
Published: 2020-09-01T22:15:10.377
Modified: 2024-11-21T05:38:44.680
Link: CVE-2020-8341

No data.

No data.