AlmaLinux OS 9 must automatically lock an account when three unsuccessful logon attempts occur.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-269147 | SRG-OS-000021-GPOS-00005 | ALMA-09-007500 | SV-269147r1050029_rule | 2025-02-20 | 1 |
| Description |
|---|
| By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. |
| ℹ️ Check |
|---|
| Verify AlmaLinux OS 9 is configured to lock an account after three unsuccessful logon attempts with the command: $ grep deny /etc/security/faillock.conf deny = 3 If the "deny" option is not set to 3 or less (but not 0), is missing or commented out, this is a finding. |
| ✔️ Fix |
|---|
| Configure AlmaLinux OS 9 to lock an account when three unsuccessful logon attempts occur using pam_faillock. First, enable the feature using the following command: $ authselect enable-feature with-faillock Then, add or update the following line in the "/etc/security/faillock.conf" file: deny = 3 |