Verify Permissions on /etc/shells File
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Description
To properly set the permissions of /etc/shells, run the command:
$ sudo chmod 0644 /etc/shells
Rationale
The /etc/shells file contains the list of full pathnames to shells on the system.
Since this file is used by many system programs this file should be protected.
Shell script
The following script can be run on the host to remediate the issue.
#!/bin/bash
chmod u-xs,g-xws,o-xwt /etc/shells
Ansible playbook
The following playbook can be run with Ansible to remediate the issue.
- name: Test for existence /etc/shells
stat:
path: /etc/shells
register: file_exists
tags:
- CCE-86626-9
- NIST-800-53-AC-3
- NIST-800-53-MP-2
- configure_strategy
- file_permissions_etc_shells
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Ensure permission u-xs,g-xws,o-xwt on /etc/shells
file:
path: /etc/shells
mode: u-xs,g-xws,o-xwt
when: file_exists.stat is defined and file_exists.stat.exists
tags:
- CCE-86626-9
- NIST-800-53-AC-3
- NIST-800-53-MP-2
- configure_strategy
- file_permissions_etc_shells
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
