Title

Membership in the Group Policy Creator Owners and Incoming Forest Trust Builders groups must be limited. (Cat II impact)

Discussion

Membership in the Group Policy Creator Owners and Incoming Forest Trust Builders groups assigns a high privilege level for AD functions. Unnecessary membership increases the risk from compromise or unintended updates. Members of these groups must specifically require those privileges and be documented.

Check Content

Start "Active Directory Users and Computers" (Available from various menus or run "dsa.msc"). Review the membership of the "Incoming Forest Trust Builders" group. Navigate to the "Built-in" container. Right-click on the "Incoming Forest Trust Builders", select "Properties" and then the "Members" tab. If any accounts are not documented as necessary with the ISSO, this is a finding. Review the membership of the "Group Policy Creator Owner" group. Navigate to the "Users" container. Right-click on the "Group Policy Creator Owner", select "Properties" and then the "Members" tab. If any accounts are not documented as necessary with the ISSO, this is a finding. It is possible to move some system-defined groups from their default locations. If a group is not in the location noted, review other containers to locate.

Fix Text

Document membership of the Group Policy Creator Owners and Incoming Forest Trust Builders groups. Remove any accounts that do not require the privileges these groups assign.

Additional Identifiers

Rule ID: SV-243487r723496_rule

Vulnerability ID: V-243487

Group Title: SRG-OS-000480

Expert Comments

CCIs tied to check.

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