System command files must not have extended ACLs.

From MAC OSX 10.6 Workstation Security Technical Implementation Guide

Associated with IA controls: ECLP-1

Associated with: CCI-001499

SV-38072r1_rule System command files must not have extended ACLs.

Vulnerability discussion

Restricting permissions will protect system command files from unauthorized modification. System command files include files present in directories used by the operating system for storing default system executables and files present in directories included in the system's default executable search paths.

Check content

Open a terminal session and enter the following command to view extended ACLs. find /bin /sbin /usr/bin /usr/sbin -print -exec ls -lLd \{\} \; | egrep '^..........+' If any command files are shown with permissions that include a '+', the file has an extended ACL, this is a finding.

Fix text

Open a terminal session and enter the following command to remove the extended ACLs. chmod -N

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