Ubuntu 22.04 LTS must enforce password complexity by requiring at least one lowercase character be used.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-260561	UBTU-22-611015	SV-260561r986286_rule		Medium

Description
Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised.

Description

Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. Password complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised.

STIG	Date
Canonical Ubuntu 22.04 LTS Security Technical Implementation Guide	2024-05-30

Details

Check Text ( C-64290r953494_chk )
Verify Ubuntu 22.04 LTS enforces password complexity by requiring that at least one lowercase character be used by using the following command: $ grep -i lcredit /etc/security/pwquality.conf lcredit = -1 If "lcredit" is greater than "-1", is commented out, or is missing, this is a finding.

Fix Text (F-64198r953495_fix)
Configure Ubuntu 22.04 LTS to enforce password complexity by requiring that at least one lowercase character be used. Add or modify the following line in the "/etc/security/pwquality.conf" file: lcredit = -1