Ubuntu 22.04 LTS must be configured so that audit log files are not read- or write-accessible by unauthorized users.

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.

Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028

Verify that the audit log files have a mode of "600" or less permissive.

Determine where the audit logs are stored by using the following command:

     $ sudo grep -iw log_file /etc/audit/auditd.conf 
     log_file = /var/log/audit/audit.log 

Using the path of the directory containing the audit logs, determine if the audit log files have a mode of "600" or less by using the following command:

     $ sudo stat -c "%n %a" /var/log/audit/* 
     /var/log/audit/audit.log 600 

If the audit log files have a mode more permissive than "600", this is a finding.

Configure the audit log files to have a mode of "600" or less permissive.

Using the path of the directory containing the audit logs, configure the audit log files to have a mode of "600" or less permissive by using the following command:

     $ sudo chmod 600 /var/log/audit/*