Firmware Security Flaw in Lenovo Notebooks
CVE-2021-3971

6.7MEDIUM

Key Information:

Vendor
Lenovo
Status
Notebook BiOS
Vendor
CVE Published:
22 April 2022

Summary

A security vulnerability in Lenovo Notebook devices arises from a driver associated with legacy manufacturing processes that was mistakenly included in the BIOS image. This flaw permits attackers with necessary privileges to alter the firmware protection region by modifying an NVRAM variable, potentially compromising the integrity and security of the affected systems. Users of impacted models are advised to implement available security updates promptly.

Affected Version(s)

Notebook BIOS various

References

https://support.lenovo.com/us/en/product_security/LEN-73440
x_refsource_MISC

CVSS V3.1

Score:
6.7
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Lenovo thanks Martin Smolár from ESET for reporting this issue.
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