Information
The operating system must permit only authorized groups ownership of the audit log files.
GROUP ID: V-270829
RULE ID: SV-270829r1066976
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, SRG-OS-000059-GPOS-00029
Solution
Configure the audit log directory and its underlying files to be owned by "root" group.
Set the "log_group" parameter of the audit configuration file to the "root" value so when a new log file is created, its group owner is properly set:
$ sudo sed -i '/^log_group/D' /etc/audit/auditd.conf
$ sudo sed -i /^log_file/a'log_group = root' /etc/audit/auditd.conf
Signal the audit daemon to reload the configuration file to update the group owners of existing files:
$ sudo systemctl kill auditd -s SIGHUP