Vulnerability · Published Jun 14, 2022 · Assigned by rapid7
CVE-2022-32230SMBv3 FileNormalizedNameInformation NULL Pointer Dereference
High 7.5
In plain English
A high-severity null pointer dereference in Windows 10 Version 20H2 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 7.9% (higher than 95% of all known vulnerabilities).
Official description
Microsoft Windows SMBv3 suffers from a null pointer dereference in versions of Windows prior to the April, 2022 patch set. By sending a malformed FileNormalizedNameInformation SMBv3 request over a named pipe, an attacker can cause a Blue Screen of Death (BSOD) crash of the Windows kernel. For most systems, this attack requires authentication, except in the special case of Windows Domain Controllers, where unauthenticated users can always open named pipes as long as they can establish an SMB session. Typically, after the BSOD, the victim SMBv3 server will reboot.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 Version 20H2 | 19042.1706 – before 19042.170619043.1706 – before 19043.170619044.1706 – before 19043.1706 |
| Microsoft | Windows Server Version 20H2 | 19042.1706 – before 19042.170619043.1706 – before 19043.170619044.1706 – before 19044.1706 |
| Microsoft | Windows 10 Version 21H1 | 19042.1706 – before 19042.170619043.1706 – before 19043.170619044.1706 – before 19044.1706 |
| Microsoft | Windows 10 Version 21H2 | 19042.1706 – before 19042.170619043.1706 – before 19043.170619044.1706 – before 19044.1706 |
Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://www.rapid7.com/blog/post/2022/06/14/cve-2022-32230-windows-smb-denial-of-service-vulnerability-fixed/ x_refsource_MISC
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-32230 x_refsource_CONFIRM
- https://github.com/zeroSteiner/metasploit-framework/blob/feat/mod/cve-2022-32230/modules/auxiliary/dos/smb/smb_filenormalizednameinformation.rb x_refsource_MISC
- https://support.microsoft.com/en-us/topic/may-10-2022-kb5013942-os-builds-19042-1706-19043-1706-and-19044-1706-60b51119-85be-4a34-9e21-8954f6749504 x_refsource_MISC