The Synchronize directory service data user right must be configured to include no accounts or groups (blank).

From Windows Server 2012/2012 R2 Domain Controller Security Technical Implementation Guide

Part of Synchronize Directory Service Data

Associated with IA controls: ECCD-2, ECAN-1, ECCD-1, ECLP-1

Associated with: CCI-002235

SV-51150r2_rule The Synchronize directory service data user right must be configured to include no accounts or groups (blank).

Vulnerability discussion

A Windows account with the "Synchronize directory service data" right has the ability to read all information in the AD database. This bypasses the object access permissions that would otherwise restrict access to the data. The scope of access granted by this right is too broad for secure usage. Specific object permissions or other group membership assignments could be used to provide access on an appropriate scale.

Check content

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 are granted the "Synchronize directory service data" user right, this is a finding.

Fix text

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> User Rights Assignment -> "Synchronize directory service data" to be defined but containing no entries (blank).

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