CVE-2020-8341 Information

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 Vector

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Reference

https://support.lenovo.com/us/en/product_security/LEN-30042

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

2.4