SB2022041803 - Security restrictions bypass in multiple Lenovo products
Published: April 18, 2022
Security Bulletin ID
SB2022041803
Severity
Low
Patch available
NO
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) 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.
Remediation
Cybersecurity Help is not aware of any official remediation provided by the vendor.