SYSTEM privilege escalation through undisclosed CLFS driver flaw
Published Jan 11, 2022 · Updated Jan 2, 2025
Elevation of privilege in the Microsoft Windows Common Log File System driver allows local users to gain SYSTEM privileges by running code. Microsoft identifies the driver but has not published the flawed function or the operation it performs on attacker-controlled input. Exploitation requires prior ability to execute low-privileged code on an affected system, and successful exploitation gives full local control.
Summary
What happened
Elevation of privilege in the Microsoft Windows Common Log File System driver allows local users to gain SYSTEM privileges by running code. Microsoft identifies the driver but has not published the flawed function or the operation it performs on attacker-controlled input. Exploitation requires prior ability to execute low-privileged code on an affected system, and successful exploitation gives full local control.
The record
- CVE
- CVE-2022-21897
- Published
- Jan 11, 2022
- Updated
- Jan 2, 2025
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 11, 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
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.10240.0 <10.0.10240.19177
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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
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Your stack
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