RHEL 8 must enforce password complexity by requiring that at least one numeric character be used.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-230359 | RHEL-08-020130 | SV-230359r1017171_rule | CCI-000194 | 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. RHEL 8 utilizes "pwquality" as a mechanism to enforce password complexity. Note that in order to require numeric characters, without degrading the minlen value, the credit value must be expressed as a negative number in "/etc/security/pwquality.conf". | ||||
| STIG | Date | |||
| Red Hat Enterprise Linux 8 Security Technical Implementation Guide | 2025-05-14 | |||
Details
Check Text (C-230359r1017171_chk)
Verify the value for "dcredit" with the following command:
$ sudo grep -r dcredit /etc/security/pwquality.conf*
/etc/security/pwquality.conf:dcredit = -1
If the value of "dcredit" is a positive number or is commented out, this is a finding.
If conflicting results are returned, this is a finding.
Fix Text (F-33003r858774_fix)
Configure the operating system to enforce password complexity by requiring that at least one numeric character be used by setting the "dcredit" option.
Add the following line to /etc/security/pwquality.conf (or modify the line to have the required value):
dcredit = -1
Remove any configurations that conflict with the above value.