AIX system must restrict the ability to switch to the root user to members of a defined group.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-215338	AIX7-00-003030	SV-215338r508663_rule		Medium

Description
Configuring a supplemental group for users permitted to switch to the root user prevents unauthorized users from accessing the root account, even with knowledge of the root credentials.

STIG	Date
IBM AIX 7.x Security Technical Implementation Guide	2022-06-06

Details

Check Text ( C-16536r294465_chk )
Examine the "sugroups" of the root user. Generally only users in the adm group should have su to root capacity. Run the following command: # lsuser -a sugroups root root sugroups=system,staff,security If "sugroups" is blank or "ALL", this is a finding.

Fix Text (F-16534r294466_fix)
Use the "chsec" command to only allow users in the adm group to su to root: # chsec -f /etc/security/user -s root -a sugroups=adm