Local privilege escalation via unsafe data deserialization
Published Jul 11, 2023 · Updated Jan 1, 2025
Unsafe deserialization in Microsoft Windows Server Update Services allows local users to elevate privileges on affected servers. Microsoft identifies untrusted-data deserialization but has not disclosed the serialized object, parser, or validation failure involved. Exploitation requires low-privileged local access and can yield control over data and service availability in the WSUS server's security context.
Summary
What happened
Unsafe deserialization in Microsoft Windows Server Update Services allows local users to elevate privileges on affected servers. Microsoft identifies untrusted-data deserialization but has not disclosed the serialized object, parser, or validation failure involved. Exploitation requires low-privileged local access and can yield control over data and service availability in the WSUS server's security context.
The record
- CVE
- CVE-2023-35317
- Published
- Jul 11, 2023
- Updated
- Jan 1, 2025
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-502, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 11, 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 <10.0.17763.4645
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.
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Technologies
Your stack
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Your stack
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