SYSTEM privilege escalation via use-after-free
Published Jan 10, 2023 · Updated Jan 1, 2025
Use-after-free in Microsoft Cryptographic Services on affected Windows releases allows local users to gain SYSTEM privileges. Microsoft identifies the weakness as use-after-free but has not published the affected function, object lifetime error, or triggering input. Exploitation requires prior low-privilege access to an affected Windows host and enables complete control under the SYSTEM account.
Summary
What happened
Use-after-free in Microsoft Cryptographic Services on affected Windows releases allows local users to gain SYSTEM privileges. Microsoft identifies the weakness as use-after-free but has not published the affected function, object lifetime error, or triggering input. Exploitation requires prior low-privilege access to an affected Windows host and enables complete control under the SYSTEM account.
The record
- CVE
- CVE-2023-21551
- Published
- Jan 10, 2023
- Updated
- Jan 1, 2025
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-416, CWE-269, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 10, 2023CVE publishedPublication date reported by the CVE source.
- Jan 1, 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=10.0.17763.0 <10.0.17763.3887
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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