Title

The macOS system must be configured so that log folders must not contain access control lists (ACLs). (Cat II impact)

Discussion

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

Check Content

To check if a log folder contains ACLs, run the following commands: /usr/bin/sudo ls -lde $(/usr/bin/sudo /usr/bin/grep '^dir' /etc/security/audit_control | awk -F: '{print $2}') In the output from the above commands, ACLs will be listed under any folder 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 folder that contains ACLs, run the following command: /usr/bin/sudo chmod -N [audit log folder]

Additional Identifiers

Rule ID: SV-252453r816173_rule

Vulnerability ID: V-252453

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

Expert Comments

CCIs tied to check.

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