Unauthorized accounts must not have the Impersonate a client after authentication user right.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-26490	WN12-UR-000025	SV-52117r2_rule		Medium

Description
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.

STIG	Date
Windows Server 2012/2012 R2 Member Server Security Technical Implementation Guide	2017-12-05

Details

Check Text ( C-46934r1_chk )

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 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 (F-45142r1_fix)
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