AIX7-00-001016 - The regular users default primary group must be staff (or equivalent) on AIX.

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Information

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.

Solution

Set the default primary groups for regular to be 'staff'.
# chsec -f /etc/security/mkuser.default -s user -a pgrp=staff

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_IBM_AIX_7-x_V2R5_STIG.zip