The AIX SYSTEM attribute must not be set to NONE for any account.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-91425	AIX7-00-001010	SV-101523r1_rule		High

Description
To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational users include organizational employees or individuals the organization deems to have equivalent status of employees (e.g., contractors). Organizational users (and processes acting on behalf of users) must be uniquely identified and authenticated to all accesses, except for the following: 1) Accesses explicitly identified and documented by the organization. Organizations document specific user actions that can be performed on the information system without identification or authentication; and 2) Accesses that occur through authorized use of group authenticators without individual authentication. Organizations may require unique identification of individuals in group accounts (e.g., shared privilege accounts) or for detailed accountability of individual activity.

Description

To assure accountability and prevent unauthenticated access, organizational users must be identified and authenticated to prevent potential misuse and compromise of the system. Organizational users include organizational employees or individuals the organization deems to have equivalent status of employees (e.g., contractors). Organizational users (and processes acting on behalf of users) must be uniquely identified and authenticated to all accesses, except for the following: 1) Accesses explicitly identified and documented by the organization. Organizations document specific user actions that can be performed on the information system without identification or authentication; and 2) Accesses that occur through authorized use of group authenticators without individual authentication. Organizations may require unique identification of individuals in group accounts (e.g., shared privilege accounts) or for detailed accountability of individual activity.

STIG	Date
IBM AIX 7.x Security Technical Implementation Guide	2020-02-24

Details

Check Text ( C-90579r1_chk )
Examine the "SYSTEM" attribute values for all users in the "/etc/security/user" file by running the following command: # lsuser -a SYSTEM ALL The above command should yield the following output: root SYSTEM=compat daemon SYSTEM=compat bin SYSTEM=compat sys SYSTEM=compat If the command displays SYSTEM=NONE for a user, this is a finding.

Fix Text (F-97623r1_fix)
For every user who has "SYSTEM=NONE", run the following command to set their "SYSTEM" value to "compat": # chuser SYSTEM=compat [user_name]