Log files must not contain ACLs.

From Apple OS X 10.10 (Yosemite) Workstation Security Technical Implementation Guide

Associated with: CCI-000162

SV-74047r1_rule Log files must not contain ACLs.

Vulnerability discussion

The audit service must be configured to create log files with the correct permissions to prevent normal users from reading audit logs. Audit logs contain sensitive data about the system and about users. If log files are set to only be readable and writable by root or administrative users with sudo, the risk is mitigated.

Check content

To check if a log file contains ACLs, run the following commands: sudo ls -le $(sudo grep '^dir' /etc/security/audit_control | awk -F: '{print $2}') | grep -v current In the output from the above commands, ACLs will be listed under any file that may contain them (e.g., '0: group:admin allow list,readattr,reaadextattr,readsecurity'). If any such line exists, this is a finding.

Fix text

For any log file that contains ACLs, run the following command: sudo chmod -N [audit log file]

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