Ubuntu OS must permit only authorized groups ownership of the audit log files.

Unauthorized disclosure of audit records can reveal system and configuration data to attackers, thus compromising its confidentiality.

Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfully audit operating system activity.

Verify the group owner of newly created audit logs is "root" by using the following command:

     $ sudo grep -iw log_group /etc/audit/auditd.conf 
     log_group = root 

If "log_group" is not set to "root", this is a finding.

Configure the group owner of newly created audit logs to be "root".

Add or modify the following lines in the "/etc/audit/auditd.conf " file:

log_group = root

Reload the configuration file of the audit service to update the group ownership of existing files:

     $ sudo systemctl kill auditd -s SIGHUP