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

DevOps & Security

Ensure journald is configured to write logfiles to persistent disk

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Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Operating_Systems/Ubuntu/CIS_Ubuntu_Linux_18.04_LTS_Benchmark_v2.2.0/cis-ubuntu1804-v220-5-1-1-4/SKILL.md

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5.1.1.4 Ensure journald is configured to write logfiles to persistent disk (Automated)

Profile

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

Description

Data from journald may be stored in volatile memory or persisted locally on the server. Logs in memory will be lost upon a system reboot. By persisting logs to local disk on the server they are protected from loss due to a reboot.

Rationale

Writing log data to disk will provide the ability to forensically reconstruct events which may have impacted the operations or security of a system even after a system crash or reboot.

Audit Procedure

Command Line

Run the following command to verify that logs are persisted to disk:

grep -Psi '^\h*Storage\h*=\h*persistent\b' /etc/systemd/journald.conf /etc/systemd/journald.conf.d/*

Verify the output matches:

Storage=persistent

Expected Result

The output should include Storage=persistent.

Remediation

Command Line

Edit the /etc/systemd/journald.conf file or a file ending in .conf in /etc/systemd/journald.conf.d/ and add the following line:

Storage=persistent

Restart the service:

systemctl restart systemd-journald

Default Value

Storage=auto

References

NIST SP 800-53 Rev. 5: AU-3, AU-12

CIS Controls

Controls Version	Control
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.