Title

Unauthorized accounts must not have the Impersonate a client after authentication user right. (Cat II impact)

Discussion

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 potentially use this to elevate privileges.

Check Content

Analyze the system using the Security Configuration and Analysis snap-in. (See "Performing Analysis with the Security Configuration and Analysis Snap-in" in the STIG Overview document.) Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> User Rights Assignment. If any accounts or groups other than the following are granted the "Impersonate a client after authentication" user right, this is a finding: Administrators Service Local Service Network Service

Fix Text

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

Additional Identifiers

Rule ID: SV-48536r2_rule

Vulnerability ID: V-26490

Group Title: Impersonate a client after authentication

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.