All shell files must have mode 0755 or less permissive.

From MAC OSX 10.6 Workstation Security Technical Implementation Guide

Associated with IA controls: ECLP-1

Associated with: CCI-000225

SV-38015r1_rule All shell files must have mode 0755 or less permissive.

Vulnerability discussion

Shells with world/group write permissions give the ability to maliciously modify the shell to obtain unauthorized access.

Check content

Open a terminal session and enter the following command. cat /etc/shells | xargs -n1 ls -lL If any shell has a mode more permissive than 0755, this is a finding.

Fix text

Open a terminal session and enter the following command to set the mode. chmod 0755

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