QID 91929

Date Published: 2022-08-10

QID 91929: Microsoft Windows Network File System (NFS) Remote Code Execution (RCE) Vulnerability for August 2022

Microsoft Windows Network File System is vulnerable to Remote Code Execution Vulnerability.

This vulnerability is not exploitable in NFSV2.0 or NFSV3.0

The KB Articles associated with the update are:
KB5016627

QID Detection Logic (Authenticated):
Operating System: Windows Server 2022 and Windows Server 2022 Core

This QID checks for the file version of nfssvr.sys and checks if the mitigations have been applied.

This vulnerability could be exploited over the network by making an unauthenticated, specially crafted call to a Network File System (NFS) service to trigger a Remote Code Execution (RCE).

CVSS V3 rated as Critical - 9.8 severity.

CVSS V2 rated as Critical - 10 severity.

Solution

Please refer to the CVE-2022-34715 for more information pertaining to the vulnerability.

Workaround:
The following PowerShell command will disable the affected NFS server versions:
PS C:\Set-NfsServerConfiguration -EnableNFSV4 $false

Vendor References

CVE-2022-34715 - msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2022-34715

CVEs related to QID 91929

CVE-2022-34715 |

Software Advisories

Advisory ID	Software	Component	Link
KB5016627			support.microsoft.com/en-in/help/5016627

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