RHEL 9 must periodically flush audit records to disk to prevent the loss of audit records.

Documentable No

Rule ID SV-258168r958428_rule

CCI References

CCI-000154

Discussion

If option "freq" is not set to a value that requires audit records being written to disk after a threshold number is reached, then audit records may be lost.

Check Procedure

Verify that audit system is configured to flush to disk after every 100 records with the following command:

$ sudo grep freq /etc/audit/auditd.conf 

freq = 100 

If "freq" isn't set to a value between "1" and "100", the value is missing, or the line is commented out, this is a finding.

Fix Action

Configure RHEL 9 to flush audit to disk by adding or updating the following rule in "/etc/audit/auditd.conf":

freq = 100

The audit daemon must be restarted for the changes to take effect.