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

Severity
Group ID
Group Title
Version
Rule ID
Date
STIG Version
mediumV-215338SRG-OS-000480-GPOS-00227AIX7-00-003030SV-215338r991589_rule2024-08-163
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.
ℹ️ Check
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
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