| name | cis-ubuntu1804-v220-5-1-1-3 |
| description | Ensure journald is configured to compress large log files |
| category | cis-logging |
| version | 2.2.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-18.04","journald","logging"] |
| cis_id | 5.1.1.3 |
| cis_benchmark | CIS Ubuntu Linux 18.04 LTS Benchmark v2.2.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
5.1.1.3 Ensure journald is configured to compress large log files (Automated)
Profile
- Level: 1 - Server
- Level: 1 - Workstation
- Assessment Status: Automated
Description
The journald system includes the capability of compressing overly large files to avoid filling up the system with logs or making the logs unmanageably large.
Rationale
Uncompressed large files may unexpectedly fill a filesystem leading to resource unavailability. Compressing logs prior to write can prevent sudden, unexpected filesystem impacts.
Audit Procedure
Command Line
Run the following command to verify that large files will be compressed:
grep -Psi '^\h*Compress\h*=\h*yes\b' /etc/systemd/journald.conf /etc/systemd/journald.conf.d/*
Verify the output matches:
Compress=yes
Expected Result
The output should include Compress=yes.
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:
Compress=yes
Restart the service:
systemctl restart systemd-journald
Default Value
Compress=yes
References
- NIST SP 800-53 Rev. 5: AU-4
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. |
| v8 | 8.3 Ensure Adequate Audit Log Storage - Ensure that logging destinations maintain adequate storage to comply with the enterprise's audit log management process. |
| 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 | 6.4 Ensure adequate storage for logs - Ensure that all systems that store logs have adequate storage space for the logs generated. |
