| name | cis-gcp-cos-4.1.1.1 |
| description | Ensure correct container image is set for stackdriver logging agent |
| category | cis-gcp-cos |
| version | 1.2.0 |
| author | cyberstrike-official |
| tags | ["cis","gcp","container-optimized-os","logging","stackdriver"] |
| cis_id | 4.1.1.1 |
| cis_benchmark | CIS Google Container-Optimized OS Benchmark v1.2.0 |
| tech_stack | ["gcp","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
4.1.1.1 Ensure correct container image is set for stackdriver logging agent (Automated)
Description
stackdriver-logging service runs stackdriver container image to export logs to Cloud Logging.
Note: This recommendation is not applicable for COS images using Fluent-bit as it isn't containerized.
Rationale
If the logging agent is not set correctly, the logs cannot be exported to Cloud Logging.
Audit Procedure
Verify LOGGING_AGENT_DOCKER_IMAGE is set to a correct stackdriver container image. Use the following command to verify:
LOGGING_AGENT_DOCKER_IMAGE="gcr.io/stackdriver-agents/stackdriver-logging-agent:<version>"
Expected Result
The output should show LOGGING_AGENT_DOCKER_IMAGE set to a valid gcr.io/stackdriver-agents/stackdriver-logging-agent:<version> image.
Remediation
Edit the LOGGING_AGENT_DOCKER_IMAGE variable in the /etc/stackdriver/env_vars file to set the correct logging agent.
Run the following command to restart stackdriver-logging service:
/etc is stateless on Container-Optimized OS. Therefore, /etc cannot be used to make these changes persistent across reboots. The steps mentioned above needs to be performed after every boot.
CIS Controls
| Controls Version | Control | IG 1 | IG 2 | IG 3 |
|---|
| 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. | x | x | x |
| v8 | 8.5 Collect Detailed Audit Logs - Configure detailed audit logging for enterprise assets containing sensitive data. Include event source, date, username, timestamp, source addresses, destination addresses, and other useful elements that could assist in a forensic investigation. | | x | x |
| v7 | - Ensure that local logging has been enabled on all systems and networking devices. |
