CVE-2020-8341
Last modified
CVE-2020-8341 is a low-severity vulnerability rated 2.4/10 on the CVSS scale. 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). EPSS estimates a 0.35% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Lenovo | Thinkpad T490 \(20nx\) Firmware | < n2iet90w |
| Lenovo | Thinkpad T490 \(20qx\) Firmware | < n2iet90w |
| Lenovo | Thinkpad T490 \(20rx\) Firmware | < n2ret16w |
| Lenovo | Thinkpad T490s \(20nx\) Firmware | < n2jet89w |
| Lenovo | Thinkpad T495 Drift Firmware | < 2020-08-30 |
| Lenovo | Thinkpad T590 \(20nx\) Firmware | < n2iet90w |
| Lenovo | Thinkpad X1 Carbon \(20qx\) Firmware | < n2het54w |
| Lenovo | Thinkpad X1 Yoga \(20qx\) Firmware | < n2het54w |
| Lenovo | Thinkpad X390 \(20qx\) Firmware | < n2jet89w |
| Lenovo | Thinkpad X390 \(20sx\) Firmware | < n2set18w |
References
- https://support.lenovo.com/us/en/product_security/LEN-30042Vendor Advisory
- https://support.lenovo.com/us/en/product_security/LEN-30042Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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