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.
Project Subscriptions
| Vendors | Products |
|---|---|
|
Lenovo
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Thinkpad T490 \(20nx\)
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Thinkpad T490 \(20nx\) Firmware
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Thinkpad T490 \(20qx\)
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Thinkpad T490 \(20qx\) Firmware
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Thinkpad T490 \(20rx\)
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Thinkpad T490 \(20rx\) Firmware
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Thinkpad T490s \(20nx\)
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Thinkpad T490s \(20nx\) Firmware
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Thinkpad T495 Drift
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Thinkpad T495 Drift Firmware
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Thinkpad T590 \(20nx\)
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Thinkpad T590 \(20nx\) Firmware
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Thinkpad X1 Carbon \(20qx\)
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Thinkpad X1 Carbon \(20qx\) Firmware
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Thinkpad X1 Yoga \(20qx\)
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Thinkpad X1 Yoga \(20qx\) Firmware
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Thinkpad X390 \(20qx\)
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Thinkpad X390 \(20qx\) Firmware
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Thinkpad X390 \(20sx\)
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Thinkpad X390 \(20sx\) Firmware
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|
Advisories
| Source | ID | Title |
|---|---|---|
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.
References
| Link | Providers |
|---|---|
| https://support.lenovo.com/us/en/product_security/LEN-30042 |
|
History
No history.
Projects
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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.
OpenCVE Enrichment
No data.
Weaknesses
EUVD