Kernel-memory disclosure via uninitialized XDR output
Published Feb 9, 2022 · Updated Jan 2, 2025
Information disclosure in Microsoft Windows Services for NFS allows remote attackers to read kernel memory through crafted ONCRPC XDR traffic. The ONCRPC XDR driver returns uninitialized output containing kernel-memory contents to a user-mode process instead of restricting output to initialized response data. Network reachability of an installed Services for NFS component is required; the reported consequence is memory disclosure only, without modification or service interruption.
Summary
What happened
Information disclosure in Microsoft Windows Services for NFS allows remote attackers to read kernel memory through crafted ONCRPC XDR traffic. The ONCRPC XDR driver returns uninitialized output containing kernel-memory contents to a user-mode process instead of restricting output to initialized response data. Network reachability of an installed Services for NFS component is required; the reported consequence is memory disclosure only, without modification or service interruption.
The record
- CVE
- CVE-2022-21993
- Published
- Feb 9, 2022
- Updated
- Jan 2, 2025
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- T1210
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 9, 2022CVE publishedPublication date reported by the CVE source.
- Jan 2, 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?
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- Affected versionversion=10.0.10240.0 <10.0.10240.19204
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
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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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