SB2021112505 - Privilege escalation in Microsoft Windows
Published: November 25, 2021 Updated: December 14, 2021
Security Bulletin ID
SB2021112505
Severity
High
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) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2021-43890)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to incorrect permissions in windows installer service. A local user can run a specially crafted program to execute arbitrary code with SYSTEM privileges.
The vulnerability exists due to incomplete patch for #VU58061 (CVE-2021-41379).
Note, the vulnerability is being actively exploited in the wild.
Remediation
Install update from vendor's website.