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3.6.11.1 (L1) Ensure 'Hardened UNC Paths' is set to 'Enabled, with 'Require Mutual Authentication' and 'Require Integrity' set for all NETLOGON and SYSVOL shares'
Information
This policy setting configures secure access to UNC paths.The recommended state for this setting is: Enabled, with 'Require Mutual Authentication' and 'Require Integrity' set for all NETLOGON and SYSVOL shares
Note: If the environment exclusively contains Windows 8.0 / Server 2012 (non-R2) or newer systems, then the ' Require Privacy ' setting may (optionally) also be set to enable SMB encryption. However, using SMB encryption will render the targeted share paths completely inaccessible by older OSes, so only use this additional option with caution and thorough testing.
Note #2: If the environment is 100% managed by Intune these shares will not be available. An exception to this recommendation will be needed.
In February 2015, Microsoft released a new control mechanism to mitigate a security risk in Group Policy as part of the
MS15-011
/
MSKB 3000483
security update. This mechanism requires both the installation of the new security update and also the deployment of specific group policy settings to all computers on the domain from Windows Vista / Server 2008 (non-R2) or newer (the associated security patch to enable this feature was not released for Server 2003). A new group policy template ( NetworkProvider.admx/adml ) was also provided with the security update.
Once the new GPO template is in place, the following are the minimum requirements to remediate the Group Policy security risk:
\\*\NETLOGON RequireMutualAuthentication=1, RequireIntegrity=1
\\*\SYSVOL RequireMutualAuthentication=1, RequireIntegrity=1
Note: A reboot may be required after the setting is applied to a client machine to access the above paths.
Additional guidance on the deployment of this security setting is available from the Microsoft Premier Field Engineering (PFE) Platforms TechNet Blog here:
Guidance on Deployment of MS15-011 and MS15-014
.
Solution
To establish the recommended configuration via configuration profiles, set the following Settings Catalog path to Enabled with the following paths configured, at a minimum:\\*\NETLOGON RequireMutualAuthentication=1, RequireIntegrity=1 \\*\SYSVOL RequireMutualAuthentication=1, RequireIntegrity=1
Administrative Templates\Network\Network Provider\Hardened UNC Paths
Impact:
Windows only allows access to the specified UNC paths after fulfilling additional security requirements.
See Also
Item Details
Audit Name: CIS Microsoft Intune for Windows 11 v3.0.1 L1
Category: IDENTIFICATION AND AUTHENTICATION
References: 800-53|IA-3(1)
Plugin: Windows
Control ID: c7d78f7a850e9c2acde5a382eab007f14e75574a0b9772d718feb44dd9a6373c