CVE-2022-32230
SMBv3 FileNormalizedNameInformation NULL Pointer Dereference
- Published
- Updated
- Reserved
- Assigned by
- rapid7
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| rapid7CNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 7.9% · top 5.2% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
Affected products
Microsoft · Windows 10 Version 20H2
- affected 19042.1706 – < 19042.1706
- affected 19043.1706 – < 19043.1706
- affected 19044.1706 – < 19043.1706
Microsoft · Windows Server Version 20H2
- affected 19042.1706 – < 19042.1706
- affected 19043.1706 – < 19043.1706
- affected 19044.1706 – < 19044.1706
Microsoft · Windows 10 Version 21H1
- affected 19042.1706 – < 19042.1706
- affected 19043.1706 – < 19043.1706
- affected 19044.1706 – < 19044.1706
Microsoft · Windows 10 Version 21H2
- affected 19042.1706 – < 19042.1706
- affected 19043.1706 – < 19043.1706
- affected 19044.1706 – < 19044.1706
What to do
Solution: This was fixed as a stability issue in the April, 2022 Patch Tuesday set from Microsoft.
Exploitation: Metasploit module: https://github.com/zeroSteiner/metasploit-framework/blob/feat/mod/cve-2022-32230/modules/auxiliary/dos/smb/smb_filenormalizednameinformation.rb
References (4)
- https://www.rapid7.com/blog/post/2022/06/14/cve-2022-32230-windows-smb-denial-of-service-vulnerability-fixed/ (opens in a new tab)x_refsource_MISCx_transferred
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-32230 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/zeroSteiner/metasploit-framework/blob/feat/mod/cve-2022-32230/modules/auxiliary/dos/smb/smb_filenormalizednameinformation.rb (opens in a new tab)x_refsource_MISCx_transferred
- 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 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-32230)Record last updated .