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-260561r1015013_rule | CCI-004066 | 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. | ||||
| STIG | Date | |||
| Canonical Ubuntu 22.04 LTS Security Technical Implementation Guide | 2025-05-16 | |||
Details
Check Text (C-260561r1015013_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