Ubuntu 24.04 LTS must enforce password complexity by requiring that at least one lowercase character be used.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-270727 | UBTU-24-400270 | SV-270727r1066670_rule | CCI-004065 | 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. Satisfies: SRG-OS-000070-GPOS-00038, SRG-OS-000730-GPOS-00190 | ||||
| STIG | Date | |||
| Canonical Ubuntu 24.04 LTS Security Technical Implementation Guide | 2025-05-16 | |||
Details
Check Text (C-270727r1066670_chk)
Verify Ubuntu 24.04 LTS enforces password complexity by requiring that at least one lowercase character be used with the following command:
$ grep -i "lcredit" /etc/security/pwquality.conf
lcredit=-1
If the "lcredit" parameter is greater than "-1", is commented out, or is missing, this is a finding.
Fix Text (F-74661r1066669_fix)
Configure Ubuntu 24.04 LTS to enforce password complexity by requiring that at least one lowercase character be used.
Add or update the "/etc/security/pwquality.conf" file to contain the "lcredit" parameter:
lcredit=-1