The regular users default primary group must be staff (or equivalent) on AIX.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-215182 | AIX7-00-001016 | SV-215182r958362_rule | CCI-000015 | medium |
| Description | ||||
| The /usr/lib/security/mkuser.default file contains the default primary groups for regular and admin users. Setting a system group as the regular users' primary group increases the risk that the regular users can access privileged resources. | ||||
| STIG | Date | |||
| IBM AIX 7.x Security Technical Implementation Guide | 2024-08-16 | |||
Details
Check Text (C-215182r958362_chk)
Check the default primary group for regular users:
# lssec -f /etc/security/mkuser.default -s user -a pgrp
The above command should yield the following output:
user pgrp=staff
If the above command shows that the primary group (pgrp) is not "staff", this is a finding.
Fix Text (F-16378r293998_fix)
Set the default primary groups for regular to be "staff".
# chsec -f /etc/security/mkuser.default -s user -a pgrp=staff