Sandbox session denial via unreleased critical section
Published Oct 11, 2022 · Updated Jan 2, 2025
Denial of service in Microsoft Windows LSM allows guest OS users to block new sandbox sessions through the container RPC interface. ContainerSessionServer::AskForSession returns after the per-container counter reaches two without releasing its critical section, leaving later calls blocked indefinitely. Exploitation requires access from a Hyper-V container and manipulated session counters; the resulting deadlock prevents new sandbox instances rather than crashing the host.
Summary
What happened
Denial of service in Microsoft Windows LSM allows guest OS users to block new sandbox sessions through the container RPC interface. ContainerSessionServer::AskForSession returns after the per-container counter reaches two without releasing its critical section, leaving later calls blocked indefinitely. Exploitation requires access from a Hyper-V container and manipulated session counters; the resulting deadlock prevents new sandbox instances rather than crashing the host.
The record
- CVE
- CVE-2022-37998
- Published
- Oct 11, 2022
- Updated
- Jan 2, 2025
- Vendor
- Microsoft
- Product
- Windows 10 Version 21H1
- Classifications
- T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 11, 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=10.0.0 <10.0.19043.2130
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
- Akamai CVE-2022-37998 proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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