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RHEL-09-411105 RHEL 9 must ensure account lockouts persist.

DISA STIG library V2R10
All changes in this version
first version loaded CAT II

Maps to AC-7 via CCI-000044

Title

RHEL 9 must ensure account lockouts persist.

Control

Verify the "/etc/security/faillock.conf" file is configured to use a nondefault faillock directory to ensure contents persist after reboot with the following command: $ sudo grep -w dir /etc/security/faillock.conf dir = /var/log/faillock If the "dir" option is not set to a nondefault documented tally log directory or is missing or commented out, this is a finding.

Discussion

Having lockouts persist across reboots ensures that account is only unlocked by an administrator. If the lockouts did not persist across reboots, an attacker could simply reboot the system to continue brute force attacks against the accounts on the system.

Related controls

CCI-000044

Fix

Configure RHEL 9 maintain the contents of the faillock directory after a reboot. Add/modify the "/etc/security/faillock.conf" file to match the following line: dir = /var/log/faillock