RHEL 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-258054 | SRG-OS-000329-GPOS-00128 | RHEL-09-411075 | SV-258054r958736_rule | 2025-02-27 | 2 |
| 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. Satisfies: SRG-OS-000329-GPOS-00128, SRG-OS-000021-GPOS-00005 |
| ℹ️ Check |
|---|
| Verify RHEL 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 RHEL 9 to lock an account when three unsuccessful logon attempts occur. Add/modify the "/etc/security/faillock.conf" file to match the following line: deny = 3 |