Title

The Deny log on as a service user right on workstations must be configured to prevent access from highly privileged domain accounts on domain systems. No other groups or accounts must be assigned this right. (Cat II impact)

Discussion

Inappropriate granting of user rights can provide system, administrative, and other high level capabilities. The "Deny log on as a service" right defines accounts that are denied log on as a service. 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. Incorrect configurations could prevent services from starting and result in a DoS.

Check Content

Analyze the system using the Security Configuration and Analysis snap-in. Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> User Rights Assignment. If the following accounts or groups are not defined for the "Deny log on as a service" right on domain joined systems, this is a finding: Enterprise Admins Group Domain Admins Group If any accounts or groups are defined for the "Deny log on as a service" right on non-domain joined systems, this is a finding.

Fix Text

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> User Rights Assignment -> "Deny log on as a service" to include the following for domain joined systems. Enterprise Admins Group Domain Admins Group Configure the "Deny log on as a service" for non-domain systems to include no entries (blank).

Additional Identifiers

Rule ID: SV-47119r1_rule

Vulnerability ID: V-26484

Group Title: Deny log on as service

Expert Comments

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