Title

The macOS system must configure audit log files to mode 440 or less permissive. (Cat II impact)

Discussion

The audit service must be configured to create log files that are readable only by the root user and group wheel. To achieve this, audit log files must be configured to mode 440 or less permissive; thereby preventing normal users from reading, modifying, or deleting audit logs. Satisfies: SRG-OS-000057-GPOS-00027,SRG-OS-000058-GPOS-00028,SRG-OS-000059-GPOS-00029,SRG-OS-000256-GPOS-00097,SRG-OS-000257-GPOS-00098,SRG-OS-000258-GPOS-00099

Check Content

Verify the macOS system is configured with audit log files set to mode 440 or less with the following command: /bin/ls -l $(/usr/bin/grep '^dir' /etc/security/audit_control | /usr/bin/awk -F: '{print $2}') | /usr/bin/awk '!/-r--r-----|current|total/{print $1}' | /usr/bin/wc -l | /usr/bin/tr -d ' ' If the result is not "0", this is a finding.

Fix Text

Configure the macOS system with audit log files set to mode 440 with the following command: /bin/chmod 440 /var/audit/*

Additional Identifiers

Rule ID: SV-259460r941002_rule

Vulnerability ID: V-259460

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.