Vulnerability Discussion

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

Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000206-GPOS-00084

Check

Verify the audit logs are group-owned by "root" or a restricted logging group.

First determine if a group other than "root" has been assigned to the audit logs with the following command:

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

Then determine where the audit logs are stored with the following command:

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

log_file = /var/log/audit/audit.log

Then using the location of the audit log file, determine if the audit log is group-owned by "root" using the following command:

$ sudo stat -c "%G %n" /var/log/audit/audit.log

root /var/log/audit/audit.log

If the audit log is not group-owned by "root" or the configured alternative logging group, this is a finding.

Fix

Change the group of the directory of "/var/log/audit" to be owned by a correct group.

Identify the group that is configured to own audit log:

$ sudo grep -P '^[ ]*log_group[ ]+=.*$' /etc/audit/auditd.conf

Change the ownership to that group:

$ sudo chgrp ${GROUP} /var/log/audit