SB2021121475 - Privilege escalation in Microsoft Windows Setup
Published: December 14, 2021 Updated: January 6, 2022
Security Bulletin ID
SB2021121475
Severity
Low
Patch available
YES
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) Link following (CVE-ID: CVE-2021-43237)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to insecure link following in Windows Setup. A local user can create a symbolic link to arbitrary file on the system and overwrite it.
Successful exploitation of the vulnerability allows privilege escalation but requires that an administrator must begin a version update of Windows.
Remediation
Install update from vendor's website.