Local SYSTEM escalation via storport integer overflow
Published Oct 13, 2021 · Updated Aug 4, 2024
Elevation of privilege in Microsoft Windows 10 Version 1507 and other listed Windows releases allows local users to execute code as SYSTEM via storport.sys. The driver fails to validate user-supplied data before calculating an allocation size, allowing an integer overflow and undersized buffer operation. Exploitation requires prior low-privileged code execution but no user interaction; successful exploitation can fully compromise confidentiality, integrity, and availability.
Summary
What happened
Elevation of privilege in Microsoft Windows 10 Version 1507 and other listed Windows releases allows local users to execute code as SYSTEM via storport.sys. The driver fails to validate user-supplied data before calculating an allocation size, allowing an integer overflow and undersized buffer operation. Exploitation requires prior low-privileged code execution but no user interaction; successful exploitation can fully compromise confidentiality, integrity, and availability.
The record
- CVE
- CVE-2021-40478
- Published
- Oct 13, 2021
- Updated
- Aug 4, 2024
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-269, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 13, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 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 <10.0.10240.19086
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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Reported exploitation
- CISA Known Exploited Vulnerabilities catalog entryknown exploited catalog
Technologies
Your stack
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Your stack
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