Kernel crash via unchecked SMBv3 device pointer
Published Jun 14, 2022 · Updated Sep 16, 2024
NULL pointer dereference in Windows SMBv3 before the April 2022 patches allows attackers to crash and reboot the Windows kernel. The srv2!Smb2ValidateVolumeObjectsMatch function dereferences a nullable PDEVICE_OBJECT and passes it to IoGetBaseFileSystemDeviceObject while handling a crafted FileNormalizedNameInformation query on a named pipe. Access normally requires an authenticated IPC$ named-pipe session or non-default guest access, but domain controllers expose anonymously openable pipes; exploitation causes a BSOD and normally an automatic reboot.
Summary
What happened
NULL pointer dereference in Windows SMBv3 before the April 2022 patches allows attackers to crash and reboot the Windows kernel. The srv2!Smb2ValidateVolumeObjectsMatch function dereferences a nullable PDEVICE_OBJECT and passes it to IoGetBaseFileSystemDeviceObject while handling a crafted FileNormalizedNameInformation query on a named pipe. Access normally requires an authenticated IPC$ named-pipe session or non-default guest access, but domain controllers expose anonymously openable pipes; exploitation causes a BSOD and normally an automatic reboot.
The record
- CVE
- CVE-2022-32230
- Published
- Jun 14, 2022
- Updated
- Sep 16, 2024
- Vendor
- Microsoft
- Product
- Windows 10 Version 21H1
- Classifications
- CWE-476, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 14, 2022CVE publishedPublication date reported by the CVE source.
- Sep 16, 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=19042.1706 <19042.1706
- Affected versionversion=19043.1706 <19043.1706
- Affected versionversion=19044.1706 <19044.1706
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
- Metasploit SMB FileNormalizedNameInformation denial-of-service moduleproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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