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Passwords for new users must have a 24 hours/1 day minimum password lifetime restriction.


Overview

Finding ID Version Rule ID IA Controls Severity
V-75471 UBTU-16-010210 SV-90151r3_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
Canonical Ubuntu 16.04 Security Technical Implementation Guide 2020-05-29

Details

Check Text ( C-75175r3_chk )
Verify that the Ubuntu operating system enforces a 24 hours/1 day minimum password lifetime for new user accounts by running 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 commented out, this is a finding.
Fix Text (F-82099r2_fix)
Configure the Ubuntu operating system 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