Default system accounts must be disabled or removed.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-810	GEN002640	SV-45206r1_rule		Medium

Description
Vendor accounts and software may contain backdoors allowing unauthorized access to the system. These backdoors are common knowledge and present a threat to system security if the account is not disabled.

STIG	Date
SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide	2018-09-19

Details

Check Text ( C-42554r1_chk )
Determine if default system accounts (such as those for sys, bin, uucp, nuucp, daemon, smtp) have been disabled. # cat /etc/shadow If an account's password field is "*", "*LK*", or is prefixed with a '!', the account is locked or disabled. If there are any unlocked default system accounts this is a finding.

Fix Text (F-38602r1_fix)
Lock the default system account(s). # passwd -l