The Ubuntu operating system must enforce password complexity by requiring that at least one lower-case character be used.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-238222 | UBTU-20-010051 | SV-238222r1015145_rule | CCI-000193 | low |
| 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 20.04 LTS Security Technical Implementation Guide | 2025-05-16 | |||
Details
Check Text (C-238222r1015145_chk)
Verify the Ubuntu operating system enforces password complexity by requiring that at least one lower-case character be used.
Determine if the field "lcredit" is set in the "/etc/security/pwquality.conf" file with the following command:
$ grep -i "lcredit" /etc/security/pwquality.conf
lcredit=-1
If the "lcredit" parameter is greater than "-1" or is commented out, this is a finding.
Fix Text (F-41391r653840_fix)
Add or update the "/etc/security/pwquality.conf" file to contain the "lcredit" parameter:
lcredit=-1