Audit logs must have a mode of 0600 or less permissive to prevent unauthorized read access.

From Canonical Ubuntu 16.04 LTS Security Technical Implementation Guide

Associated with: CCI-000162 CCI-000163 CCI-000164

SV-90315r2_rule Audit logs must have a mode of 0600 or less permissive to prevent unauthorized read access.

Vulnerability discussion

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 Ubuntu operating system activity.Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029

Check content

Verify the audit logs have a mode of "0600" or less permissive. First 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 Using the location of the audit log file, check if the audit log has a mode of "0600" or less permissive with the following command: # sudo stat -c "%a %n" /var/log/audit/audit.log 600 /var/log/audit/audit.log If the audit log has a mode more permissive than "0600", this is a finding.

Fix text

Configure the audit log to be protected from unauthorized read access by setting the correct permissive mode with the following command: # sudo chmod 0600 [audit_log_file] Replace "[audit_log_file]" to the correct audit log path, by default this location is "/var/log/audit/audit.log".

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