ACLs for system log files must be set correctly.

From Apple OS X 10.9 (Mavericks) Workstation Security Technical Implementation Guide

Associated with: CCI-001314

SV-72933r1_rule ACLs for system log files must be set correctly.

Vulnerability discussion

System logs should only be readable by root or admin users. System logs frequently contain sensitive information that could be used by an attacker. Setting the correct ACLs mitigates this risk.

Check content

These commands check for log files that exist on the system and print out the list of ACLs if there are any. sudo ls -ld@ $(grep -v '^#' /etc/newsyslog.conf | awk '{ print $1 }') 2> /dev/null sudo ls -ld@ $(grep -e '^>' /etc/asl.conf /etc/asl/* | awk '{ print $2 }') 2> /dev/null ACLs will be listed under any file that may contain them. i.e. '0: group:admin allow list,readattr,reaadextattr,readsecurity' If any system log file contains this information, this is a finding.

Fix text

For any log file that returns an ACL, run the following command: sudo chmod -N [log file] [log file] is the full path to the log file in question.

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