SYSTEM privilege escalation through undisclosed CLFS flaw
Published Feb 9, 2022 · Updated Jan 2, 2025
Elevation of privilege in the Microsoft Windows CLFS Driver allows local users with low privileges to obtain SYSTEM access. Microsoft has not disclosed the defective CLFS operation or the attacker-controlled input that triggers it. Exploitation requires local low-privilege access; successful exploitation grants full control over the affected host.
Summary
What happened
Elevation of privilege in the Microsoft Windows CLFS Driver allows local users with low privileges to obtain SYSTEM access. Microsoft has not disclosed the defective CLFS operation or the attacker-controlled input that triggers it. Exploitation requires local low-privilege access; successful exploitation grants full control over the affected host.
The record
- CVE
- CVE-2022-21981
- Published
- Feb 9, 2022
- Updated
- Jan 2, 2025
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 9, 2022CVE publishedPublication date reported by the CVE source.
- Jan 2, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.10240.0 <10.0.10240.19204
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo