OL 9 must maintain an account lock until the locked account is released by an administrator.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-271755 | SRG-OS-000329-GPOS-00128 | OL09-00-002417 | SV-271755r1091977_rule | 2026-02-17 | 1 |
Description
By limiting the number of failed logon attempts the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced. Limits are imposed by locking the account.
Satisfies: SRG-OS-000329-GPOS-00128, SRG-OS-000021-GPOS-00005
ℹ️ Check
Verify that OL 9 is configured to lock an account until released by an administrator after three unsuccessful logon attempts with the command:
$ grep 'unlock_time =' /etc/security/faillock.conf
unlock_time = 0
If the "unlock_time" option is not set to "0", the line is missing, or commented out, this is a finding.
✔️ Fix
Configure OL 9 to lock an account until released by an administrator after three unsuccessful logon attempts with the command:
$ sudo authselect enable-feature with-faillock
Then edit the "/etc/security/faillock.conf" file as follows:
unlock_time = 0