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-52117r1_rule	ECLP-1	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 Member Server Security Technical Implementation Guide	2014-01-07

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