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CVE-2020-8341

Quick assessment

Affected
Lenovo ThinkPad
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Lenovo ThinkPad是联想（Lenovo）的一个便携式计算机。 在Lenovo系统中，SMM BIOS Write Protection用于防止写入SPI Flash。尽管这提供了足够的保护，但SPI保护范围寄存器（PRx）提供了额外的保护层。在某些Lenovo ThinkPad系统版本的BIOS中从S3睡眠模式恢复后，并未设置PRx。这会影响SMM BIOS Write Protection，从而导致系统不受保护。

EPSS 0.35% · P26

Possible ATT&CK Techniques 1 AI

T1202 · Indirect Command Execution
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I. Basic Information for CVE-2020-8341

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Lenovo 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Lenovo ThinkPad是联想（Lenovo）的一个便携式计算机。 在Lenovo系统中，SMM BIOS Write Protection用于防止写入SPI Flash。尽管这提供了足够的保护，但SPI保护范围寄存器（PRx）提供了额外的保护层。在某些Lenovo ThinkPad系统版本的BIOS中从S3睡眠模式恢复后，并未设置PRx。这会影响SMM BIOS Write Protection，从而导致系统不受保护。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Lenovo ThinkPad various -

II. Public POCs for CVE-2020-8341

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III. Intelligence Information for CVE-2020-8341

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Vendor Advisories for CVE-2020-8341 (1)

IV. Related Vulnerabilities

Same product: ThinkPad
Same vendor: Lenovo

V. Comments for CVE-2020-8341

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