Verify User Who Owns /etc/at.allow file
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Description
If /etc/at.allow
exists, it must be owned by root
.
To properly set the owner of /etc/at.allow
, run the command:
$ sudo chown root /etc/at.allow
Rationale
If the owner of the at.allow file is not set to root, the possibility exists for an
unauthorized user to view or edit sensitive information.
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
chown 0 /etc/at.allow
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
- configure_strategy
- file_owner_at_allow
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Test for existence /etc/at.allow
stat:
path: /etc/at.allow
register: file_exists
when: '"kernel" in ansible_facts.packages'
tags:
- PCI-DSSv4-2.2
- PCI-DSSv4-2.2.6
- configure_strategy
- file_owner_at_allow
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- name: Ensure owner 0 on /etc/at.allow
file:
path: /etc/at.allow
owner: '0'
when:
- '"kernel" in ansible_facts.packages'
- file_exists.stat is defined and file_exists.stat.exists
tags:
- PCI-DSSv4-2.2
- PCI-DSSv4-2.2.6
- configure_strategy
- file_owner_at_allow
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed