VulnerabilityModified
CVE-2020-8341
In Lenovo systems, SMM BIOS Write Protection is used to prevent writes to SPI Flash.
LOW 2.4EPSS 0.35%
Does this matter?
Lower severity and a low EPSS score (0.35%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 2.4 LOWCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- EPSS
- 0.35% probability · 28th percentile
- CISA KEV
- Not listed
- Affected
- lenovo/thinkpad t490 \(20nx\) firmware · lenovo/thinkpad t490 \(20qx\) firmware · lenovo/thinkpad t490 \(20rx\) firmware · lenovo/thinkpad t490s \(20nx\) firmware · lenovo/thinkpad t495 drift firmware · lenovo/thinkpad t590 \(20nx\) firmware · lenovo/thinkpad x1 carbon \(20qx\) firmware · lenovo/thinkpad x1 yoga \(20qx\) firmware · lenovo/thinkpad x390 \(20qx\) firmware · lenovo/thinkpad x390 \(20sx\) firmware
- Source
- psirt@lenovo.com
References
- https://support.lenovo.com/us/en/product_security/LEN-30042Vendor Advisory
- https://support.lenovo.com/us/en/product_security/LEN-30042Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.