Users must not be able to change passwords more than once every 24 hours.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-38477	RHEL-06-000051	SV-50277r1_rule		Medium

Description
Setting the minimum password age protects against users cycling back to a favorite password after satisfying the password reuse requirement.

STIG	Date
Red Hat Enterprise Linux 6 Security Technical Implementation Guide	2015-05-26

Details

Check Text ( C-46032r1_chk )
To check the minimum password age, run the command: $ grep PASS_MIN_DAYS /etc/login.defs The DoD requirement is 1. If it is not set to the required value, this is a finding.

Fix Text (F-43422r1_fix)
To specify password minimum age for new accounts, edit the file "/etc/login.defs" and add or correct the following line, replacing [DAYS] appropriately: PASS_MIN_DAYS [DAYS] A value of 1 day is considered sufficient for many environments. The DoD requirement is 1.