Local privilege escalation via TOCTOU race
Published Jul 11, 2023 · Updated Feb 28, 2025
A TOCTOU race in Microsoft Malware Protection Engine before 1.1.23050.3 allows local users to elevate privileges. Microsoft has not disclosed the checked resource, intervening state change, or privileged operation that uses the stale result. Exploitation requires low local privileges and winning a high-complexity race, and it can modify protected data or interrupt the service.
Summary
What happened
A TOCTOU race in Microsoft Malware Protection Engine before 1.1.23050.3 allows local users to elevate privileges. Microsoft has not disclosed the checked resource, intervening state change, or privileged operation that uses the stale result. Exploitation requires low local privileges and winning a high-complexity race, and it can modify protected data or interrupt the service.
The record
- CVE
- CVE-2023-33156
- Published
- Jul 11, 2023
- Updated
- Feb 28, 2025
- Vendor
- Microsoft
- Product
- Microsoft Malware Protection Engine
- Classifications
- CWE-367, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 11, 2023CVE publishedPublication date reported by the CVE source.
- Feb 28, 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=1.1.0.0 <1.1.23050.3
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.
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Technologies
Your stack
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Your stack
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