Ensure that /etc/cron.deny does not exist
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Description
The file /etc/cron.deny
should not exist.
Use /etc/cron.allow
instead.
Rationale
Access to cron
should be restricted.
It is easier to manage an allow list than a deny list.
Shell script
The following script can be run on the host to remediate the issue.
#!/bin/bash
# Remediation is applicable only in certain platforms
if dpkg-query --show --showformat='${db:Status-Status}
' 'kernel' 2>/dev/null | grep -q installed; then
if [[ -f /etc/cron.deny ]]; then
rm /etc/cron.deny
fi
else
>&2 echo 'Remediation is not applicable, nothing was done'
fi
Ansible playbook
The following playbook can be run with Ansible to remediate the issue.
- name: Gather the package facts
package_facts:
manager: auto
tags:
- PCI-DSSv4-2.2
- PCI-DSSv4-2.2.6
- disable_strategy
- file_cron_deny_not_exist
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Remove /etc/cron.deny
file:
path: /etc/cron.deny
state: absent
when: '"kernel" in ansible_facts.packages'
tags:
- PCI-DSSv4-2.2
- PCI-DSSv4-2.2.6
- disable_strategy
- file_cron_deny_not_exist
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed