Vulnerability Discussion
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities.
The "Deny log on as a service" user right defines accounts that are denied logon as a service.
Incorrect configurations could prevent services from starting and result in a denial of service.
Check
This applies to domain controllers. A separate version applies to other systems.
Verify the effective setting in Local Group Policy Editor.
Run "gpedit.msc".
Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment.
If any accounts or groups are defined for the "Deny log on as a service" user right, this is a finding.
For server core installations, run the following command:
Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt
Review the text file.
If any SIDs are granted the "SeDenyServiceLogonRight" user right, this is a finding.
Fix
Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Deny log on as a service" to include no entries (blank).