cis-ubuntu1804-v220-5-1-1-1-4

DevOps & Security

Ensure journald is not configured to receive logs from a remote client

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5.1.1.1.4 Ensure journald is not configured to receive logs from a remote client (Automated)

Profile

Level: 1 - Server
Level: 1 - Workstation
Assessment Status: Automated

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 services; 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.

Audit Procedure

Command Line

Run the following command to verify systemd-journal-remote.socket is not enabled:

systemctl is-enabled systemd-journal-remote.socket

Verify the output matches:

disabled

Expected Result

The output should show disabled.

Remediation

Command Line

Run the following command to disable systemd-journal-remote.socket:

systemctl --now disable systemd-journal-remote.socket

Default Value

systemd-journal-remote.socket is disabled by default.

References

NIST SP 800-53 Rev. 5: AU-2, AU-12, CM-6, CM-7

CIS Controls

Controls Version	Control
v8	4.8 Uninstall or Disable Unnecessary Services on Enterprise Assets and Software - Uninstall or disable unnecessary services on enterprise assets and software.
v8	8.2 Collect Audit Logs - Collect audit logs. Ensure that logging, per the enterprise's audit log management process, has been enabled across enterprise assets.
v7	6.2 Activate audit logging - Ensure that local logging has been enabled on all systems and networking devices.
v7	6.3 Enable Detailed Logging - Enable system logging to include detailed information such as an event source, date, user, timestamp, source addresses, destination addresses, and other useful elements.
v7	9.2 Ensure Only Approved Ports, Protocols and Services Are Running - Ensure that only network ports, protocols, and services listening on a system with validated business needs, are running on each system.