WN16-UR-000220 - The Impersonate a client after authentication user right must only be assigned to Administrators, Service, Local Service, and Network Service.

Information

Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.

The 'Impersonate a client after authentication' user right allows a program to impersonate another user or account to run on their behalf. An attacker could use this to elevate privileges.

Solution

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> 'Impersonate a client after authentication' to include only the following accounts or groups:

- Administrators
- Service
- Local Service
- Network Service

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_MS_Windows_Server_2016_V2R10_STIG.zip