The Deny log on locally user right on member servers must be configured to prevent access from highly privileged domain accounts on domain systems and from unauthenticated access on all systems.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-73771	WN16-MS-000400	SV-88435r1_rule		Medium

Description
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Deny log on locally" user right defines accounts that are prevented from logging on interactively. In an Active Directory Domain, denying logons to the Enterprise Admins and Domain Admins groups on lower-trust systems helps mitigate the risk of privilege escalation from credential theft attacks, which could lead to the compromise of an entire domain. The Guests group must be assigned this right to prevent unauthenticated access.

Description

Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Deny log on locally" user right defines accounts that are prevented from logging on interactively. In an Active Directory Domain, denying logons to the Enterprise Admins and Domain Admins groups on lower-trust systems helps mitigate the risk of privilege escalation from credential theft attacks, which could lead to the compromise of an entire domain. The Guests group must be assigned this right to prevent unauthenticated access.

STIG	Date
Windows Server 2016 Security Technical Implementation Guide	2018-03-07

Details

Check Text ( C-73853r1_chk )
This applies to member servers and standalone systems. A separate version applies to domain controllers. 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 the following accounts or groups are not defined for the "Deny log on locally" user right, this is a finding. Domain Systems Only: - Enterprise Admins Group - Domain Admins Group Systems dedicated to the management of Active Directory (AD admin platforms, see V-36436 in the Active Directory Domain STIG) are exempt from this. All Systems: - Guests Group

Check Text ( C-73853r1_chk )

This applies to member servers and standalone systems. A separate version applies to domain controllers.

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 the following accounts or groups are not defined for the "Deny log on locally" user right, this is a finding.

Domain Systems Only:
- Enterprise Admins Group
- Domain Admins Group

Systems dedicated to the management of Active Directory (AD admin platforms, see V-36436 in the Active Directory Domain STIG) are exempt from this.

All Systems:
- Guests Group

Fix Text (F-80221r1_fix)
Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Deny log on locally" to include the following: Domain Systems Only: - Enterprise Admins Group - Domain Admins Group Systems dedicated to the management of Active Directory (AD admin platforms, see V-36436 in the Active Directory Domain STIG) are exempt from this. All Systems: - Guests Group

Fix Text (F-80221r1_fix)

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Deny log on locally" to include the following:

Domain Systems Only:
- Enterprise Admins Group
- Domain Admins Group

Systems dedicated to the management of Active Directory (AD admin platforms, see V-36436 in the Active Directory Domain STIG) are exempt from this.

All Systems:
- Guests Group