Local privilege escalation via improper kernel object handling
Published Jun 8, 2021 · Updated Aug 3, 2024
Elevation of privilege in Microsoft Windows kernel-mode drivers on affected Windows releases allows local users to execute arbitrary code in kernel mode. The kernel-mode driver improperly handles objects in memory, enabling a specially crafted local application to cross from a low-privilege account into kernel execution. Exploitation requires local logon and no user interaction; successful exploitation can expose, alter, or delete data and disrupt system availability.
Summary
What happened
Elevation of privilege in Microsoft Windows kernel-mode drivers on affected Windows releases allows local users to execute arbitrary code in kernel mode. The kernel-mode driver improperly handles objects in memory, enabling a specially crafted local application to cross from a low-privilege account into kernel execution. Exploitation requires local logon and no user interaction; successful exploitation can expose, alter, or delete data and disrupt system availability.
The record
- CVE
- CVE-2021-31952
- Published
- Jun 8, 2021
- Updated
- Aug 3, 2024
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 8, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record 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=10.0.0 <10.0.17763.1999
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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