Verify Permissions on /var/log/cloud-init.log(.*) Files

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Description

To properly set the permissions of /var/log/cloud-init.log, run the command:

$ sudo chmod 0644 /var/log/cloud-init.log

Rationale

The /var/log/cloud-init.log file contains detailed debugging information that helps users troubleshoot cloud-init and should only be accessed by authorized personnel.

Remediation

Shell script

The following script can be run on the host to remediate the issue.

#!/bin/bash

find -L /var/log/ -maxdepth 1 -perm /u+xs,g+xws,o+xwt  -type f -regextype posix-extended -regex '.*cloud-init.log([^\/]+)?$' -exec chmod u-xs,g-xws,o-xwt {} \;

Ansible playbook

The following playbook can be run with Ansible to remediate the issue.

- name: Find /var/log/ file(s)
  command: find -L /var/log/ -maxdepth 1 -perm /u+xs,g+xws,o+xwt  -type f -regextype
    posix-extended -regex ".*cloud-init.log([^\/]+)?$"
  register: files_found
  changed_when: false
  failed_when: false
  check_mode: false
  tags:
  - configure_strategy
  - file_permissions_var_log_cloud-init
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed

- name: Set permissions for /var/log/ file(s)
  file:
    path: '{{ item }}'
    mode: u-xs,g-xws,o-xwt
    state: file
  with_items:
  - '{{ files_found.stdout_lines }}'
  tags:
  - configure_strategy
  - file_permissions_var_log_cloud-init
  - low_complexity
  - low_disruption
  - medium_severity
  - no_reboot_needed