The root account must be the only account having an UID of 0.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-773	GEN000880	SV-39820r1_rule	ECLP-1 IAIA-1 IAIA-2	Medium

Description
If an account has an UID of 0, it has root authority. Multiple accounts with an UID of 0 afford more opportunity for potential intruders to guess a password for a privileged account.

STIG	Date
Solaris 10 X86 Security Technical Implementation Guide	2014-04-04

Details

Check Text ( C-38691r1_chk )
Check the system for duplicate UID 0 assignments by listing all accounts assigned UID 0. Procedure: # awk -F: '$3 == 0' /etc/passwd If any accounts other than root are assigned UID 0, this is a finding.

Fix Text (F-24403r1_fix)
Remove or change the UID of accounts other than root that have UID 0.