Domain-joined systems (excluding domain controllers) must not be configured for unconstrained delegation.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-92285	AD.0018	SV-102373r1_rule		Medium

Description
Unconstrained delegation enabled on a computer can allow the computer account to be impersonated without limitation. If delegation is required, it must be limited/constrained to the specific services and accounts required.

STIG	Date
Active Directory Domain Security Technical Implementation Guide (STIG)	2019-03-21

Details

Check Text ( C-91557r1_chk )
Open "Windows PowerShell" on a domain controller. Enter "Get-ADComputer -Filter {(TrustedForDelegation -eq $True) -and (PrimaryGroupID -eq 515)} -Properties TrustedForDelegation, TrustedToAuthForDelegation, ServicePrincipalName, Description, PrimaryGroupID". If any computers are returned, this is a finding. (TrustedForDelegation equaling True indicates unconstrained delegation.) PrimaryGroupID 515 = Domain computers (excludes DCs) TrustedForDelegation = Unconstrained Delegation TrustedToAuthForDelegation = Constrained delegation ServicePrincipalName = Service Names Description = Computer Description

Check Text ( C-91557r1_chk )

Open "Windows PowerShell" on a domain controller.

Enter "Get-ADComputer -Filter {(TrustedForDelegation -eq $True) -and (PrimaryGroupID -eq 515)} -Properties TrustedForDelegation, TrustedToAuthForDelegation, ServicePrincipalName, Description, PrimaryGroupID".

If any computers are returned, this is a finding.
(TrustedForDelegation equaling True indicates unconstrained delegation.)

PrimaryGroupID 515 = Domain computers (excludes DCs)
TrustedForDelegation = Unconstrained Delegation
TrustedToAuthForDelegation = Constrained delegation
ServicePrincipalName = Service Names
Description = Computer Description

Fix Text (F-98499r1_fix)
Remove unconstrained delegation from computers in the domain. Select "Properties" for the computer object. Select the "Delegation" tab. De-select "Trust this computer for delegation to any service (Kerberos only)" Configured constrained delegation for specific services where required.