RHEL 9 must enforce password complexity by requiring that at least one uppercase character be used.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-258111 | SRG-OS-000069-GPOS-00037 | RHEL-09-611110 | SV-258111r1045226_rule | 2025-02-27 | 2 |
| 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. Requiring a minimum number of uppercase characters makes password guessing attacks more difficult by ensuring a larger search space. |
| ℹ️ Check |
|---|
| Verify that RHEL 9 enforces password complexity by requiring that at least one uppercase character be used. Check the value for "ucredit" with the following command: $ grep ucredit /etc/security/pwquality.conf /etc/security/pwquality.conf.d/*.conf ucredit = -1 If the value of "ucredit" is a positive number or is commented out, this is a finding. |
| ✔️ Fix |
|---|
| Configure RHEL 9 to enforce password complexity by requiring that at least one uppercase character be used by setting the "ucredit" option. Add or update the following line in the "/etc/security/pwquality.conf" file or a configuration file in the "/etc/security/pwquality.conf.d/" directory to contain the "ucredit" parameter: ucredit = -1 |