SB2022041801 - Multiple vulnerabilities in Lenovo products

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Main Vulnerability Database SB2022041801

SB2022041801 - Multiple vulnerabilities in Lenovo products

Published: April 18, 2022

Security Bulletin ID SB2022041801
Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Input validation error (CVE-ID: CVE-2021-3970)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to insufficient validation of user-supplied input in LenovoVariable SMI Handler. A local user can run a specially crafted program to execute arbitrary code with elevated privileges.


2) Security restrictions bypass (CVE-ID: CVE-2021-3971)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to an error in driver used during older manufacturing processes and was mistakenly included in the BIOS image. A local privileged user can modify firmware protection region by changing an NVRAM variable and bypass implemented security restrictions.


3) Security restrictions bypass (CVE-ID: CVE-2021-3972)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to an error in driver used during manufacturing process and was mistakenly not deactivated. A local privileged user can modify secure boot setting by modifying an NVRAM variable and bypass implemented security restrictions.


Remediation

Install update from vendor's website.

References