Disable systemd-journal-remote Socket
Cette page n'est pas encore disponible en français, sa traduction est en cours.
Si vous avez des questions ou des retours sur notre projet de traduction actuel,
n'hésitez pas à nous contacter.
Description
Journald supports the ability to receive messages from remote hosts,
thus acting as a log server. Clients should not receive data from
other hosts.
NOTE:
The same package, systemd-journal-remote , is used for both sending
logs to remote hosts and receiving incoming logs.
With regards to receiving logs, there are two Systemd unit files;
systemd-journal-remote.socket and systemd-journal-remote.service.
Rationale
If a client is configured to also receive data, thus turning it into
a server, the client system is acting outside it’s operational boundary.
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 [ ! -f /.dockerenv ] && [ ! -f /run/.containerenv ]; then
SOCKET_NAME="systemd-journal-remote.socket"
SYSTEMCTL_EXEC='/usr/bin/systemctl'
if "$SYSTEMCTL_EXEC" -q list-unit-files --type socket | grep -q "$SOCKET_NAME"; then
"$SYSTEMCTL_EXEC" stop "$SOCKET_NAME"
"$SYSTEMCTL_EXEC" mask "$SOCKET_NAME"
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: Disable systemd-journal-remote Socket - Collect systemd Socket Units Present
in the System
ansible.builtin.command:
cmd: systemctl -q list-unit-files --type socket
register: result_systemd_unit_files
changed_when: false
when: ansible_virtualization_type not in ["docker", "lxc", "openvz", "podman", "container"]
tags:
- disable_strategy
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- socket_systemd-journal-remote_disabled
- name: Disable systemd-journal-remote Socket - Ensure systemd-journal-remote.socket
is Masked
ansible.builtin.systemd:
name: systemd-journal-remote.socket
state: stopped
enabled: false
masked: true
when:
- ansible_virtualization_type not in ["docker", "lxc", "openvz", "podman", "container"]
- result_systemd_unit_files.stdout_lines is search("systemd-journal-remote.socket")
tags:
- disable_strategy
- low_complexity
- low_disruption
- medium_severity
- no_reboot_needed
- socket_systemd-journal-remote_disabled
