Title

NixOS audit logs must have a mode of 0600 or less permissive. (Cat II impact)

Discussion

Only authorized personnel should be aware of errors and the details of the errors. Error messages are an indicator of an organization's operational state or can identify the NixOS system or platform. Additionally, Personally Identifiable Information (PII) and operational information must not be revealed through error messages to unauthorized personnel or their designated representatives. The structure and content of error messages must be carefully considered by the organization and development team. The extent to which the information system is able to identify and handle error conditions is guided by organizational policy and operational requirements. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000206-GPOS-00084

Check Content

Verify that the audit log files have a mode of "0600" or less permissive. First, determine where the audit logs are stored with the following command: $ sudo grep log_file /etc/audit/auditd.conf log_file = /var/log/audit/audit.log Using the path of the directory containing the audit logs, check if the audit log files have a mode of "0600" or less by using the following command: $ sudo find /var/log/audit -type f -exec stat -c "%a %n" {} \; 600 /var/log/audit/audit.log If the audit log files have a mode more permissive than "0600", this is a finding.

Fix Text

Verify that the audit log files have a mode of "0600" or less permissive. Using the path of the directory containing the audit logs, configure the audit log files have a mode of "0600" or less by using the following command: $ sudo chmod 0600 /var/log/audit/audit.log

Additional Identifiers

Rule ID: SV-268114r1039230_rule

Vulnerability ID: V-268114

Group Title: SRG-OS-000057-GPOS-00027

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.