AIX Operating systems must enforce 24 hours/1 day as the minimum password lifetime.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-215222	AIX7-00-001125	SV-215222r508663_rule		Medium

Description
Enforcing a minimum password lifetime helps to prevent repeated password changes to defeat the password reuse or history enforcement requirement. If users are allowed to immediately and continually change their password, then the password could be repeatedly changed in a short period of time to defeat the organization's policy regarding password reuse.

STIG	Date
IBM AIX 7.x Security Technical Implementation Guide	2022-06-06

Details

Check Text ( C-16420r294117_chk )

From the command prompt, run the following command to check the system default "minage" attribute value: # lssec -f /etc/security/user -s default -a minage default minage=1 If the default "minage" value is not set, or its value is less than "1", this is a finding. From the command prompt, run the following command to check "minage" attribute value for all accounts: # lsuser -a minage ALL root minage=1 user1 minage=1 user2 minage=2 If any user's "minage" value is less than "1", this is a finding.

Fix Text (F-16418r294118_fix)
From the command prompt, run the following command to set "minage=1" for the default stanza in "/etc/security/user": # chsec -f /etc/security/user -s default -a minage=1 For each user who has "minage=0" set its "minage" to "1" by running the following command from command prompt: # chsec -f /etc/security/user -s [user_name] -a minage=1