Ensure user sys is secured

MediumLevel 1Automatedaix

Description

This change locks and disables login access for the sys user account. This change disables direct local and remote login to the sys user account. Do not set a password on this account to ensure that the only access is via su from the root account. There should not be a requirement to log in as the sys user directly. Audit: `lsuser -a account_locked login rlogin sys` must show true/false/false; an absent account is compliant.

How it is checked

Audit method: Shell command

shell

command -v lsuser >/dev/null 2>&1 || exit 1; lsuser sys >/dev/null 2>&1 || { echo compliant; exit 0; }; out=$(lsuser -a account_locked login rlogin sys 2>/dev/null); [ "$out" = "sys account_locked=true login=false rlogin=false" ] && echo compliant || echo "$out"

Expected output: compliant

How it is fixed

Fix method: Shell command

shell

chuser account_locked=true login=false rlogin=false sys

Properties

Operating systems: Any
Tags: aixaccounts
Reference: CIS IBM AIX 7 Benchmark v1.2.0 - 5.3.8 Ensure user sys is secured

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell

tmaegis scan --target aix