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V-270730

CAT II (Medium)

Ubuntu 24.04 LTS must enforce 24 hours/1 day as the minimum password lifetime. Passwords for new users must have a 24 hours/1 day minimum password lifetime restriction.

Rule ID

SV-270730r1066679_rule

STIG

Canonical Ubuntu 24.04 LTS Security Technical Implementation Guide

Version

V1R5

CCIs

CCI-004065 CCI-004066

Discussion

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. Satisfies: SRG-OS-000075-GPOS-00043, SRG-OS-000730-GPOS-00190

Check Content

Verify Ubuntu 24.04 LTS enforces a 24 hours/1 day minimum password lifetime for new user accounts with the following command: 
 
$ grep -i ^PASS_MIN_DAYS /etc/login.defs 
PASS_MIN_DAYS    1 
 
If the "PASS_MIN_DAYS" parameter value is less than "1" or is commented out, this is a finding.

Fix Text

Configure Ubuntu 24.04 LTS to enforce a 24 hours/1 day minimum password lifetime. 
 
Add or modify the following line in the "/etc/login.defs" file: 
 
PASS_MIN_DAYS    1