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All Interactive User Home Directories Must Have mode 0750 Or Less Permissive

An XCCDF Rule

Description

Change the mode of interactive users home directories to 0750. To change the mode of interactive users home directory, use the following command: 

$ sudo chmod 0750 /home/USER

Rationale

Excessive permissions on local interactive user home directories may allow unauthorized access to user files by other users.

ID
xccdf_org.ssgproject.content_rule_file_permissions_home_directories
Severity
Medium
References
Updated



Remediation - Ansible

- name: Get all local users from /etc/passwd
  ansible.builtin.getent:
    database: passwd
    split: ':'
  tags:
  - CCE-80530-9

Remediation - Shell Script


for home_dir in $(awk -F':' '{ if ($3 >= 1000 && $3 != 65534) print $6 }' /etc/passwd); do
    # Only update the permissions when necessary. This will avoid changing the inode timestamp when
    # the permission is already defined as expected, therefore not impacting in possible integrity
    # check systems that also check inodes timestamps.
    find "$home_dir" -maxdepth 0 -perm /7027 -exec chmod u-s,g-w-s,o=- {} \;