Cis Docker V170 1.1.5

---
name: cis-docker-v170-1.1.5
description: "Ensure auditing is configured for Docker files and directories - /var/lib/docker"
category: cis-docker
version: "1.7.0"
author: cyberstrike-official
tags: [cis, docker, host-configuration, auditing, filesystem]
cis_id: "1.1.5"
cis_benchmark: "CIS Docker Benchmark v1.7.0"
tech_stack: [docker, linux, auditd]
cwe_ids: []
chains_with: []
prerequisites: []
severity_boost: {}
---

# CIS Docker Benchmark v1.7.0 - Control 1.1.5

## Profile

- **Level:** 1 - Docker - Linux
- **Assessment Status:** Manual

## Description

Audit `/var/lib/docker`.

## Rationale

As well as auditing the normal Linux file system and system calls, you should also audit all Docker related files and directories. The Docker daemon runs with `root` privileges and its behaviour depends on some key files and directories. `/var/lib/docker` is one such directory. As it holds all the information about containers it should be audited.

## Impact

Auditing can generate large log files. You should ensure that these are rotated and archived periodically. A separate partition should also be created for audit logs to avoid filling up any other critical partition.

## Audit Procedure

You should verify that there is an audit rule applied to the `/var/lib/docker` directory.
For example, you could execute the command below:

```bash
auditctl -l | grep /var/lib/docker
```

This should list a rule for the `/var/lib/docker` directory.

## Remediation

You should add a rule for the `/var/lib/docker` directory.
Adding exclusions for /var/lib/docker/overlay2 & /var/lib/docker/volumes reduces the audit messages to a more manageable level.
For example,
Add the line as below to the `/etc/audit/rules.d/audit.rules` file:

```bash
-a exit,always -F path=/var/lib/docker -F perm=war -k docker
-a exit,never -F dir=/var/lib/docker/volumes
-a exit,never -F dir=/var/lib/docker/overlay2
```

or for systems with namespace-remapping enabled

```bash
-a exit,always -F path=/var/lib/docker -F perm=war -k docker
-a exit,never -F dir=/var/lib/docker/165536.165536/volumes
-a exit,never -F dir=/var/lib/docker/165536.165536/overlay2
```

Then, restart the audit daemon using the following command

```bash
systemctl restart auditd
```

## Default Value

By default, Docker related files and directories are not audited.

## References

1. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/system_design_guide/auditing-the-system_system-design-guide

## CIS Controls

| Controls Version | Control                                                                                                                                                                                                                                                                                  | IG 1 | IG 2 | IG 3 |
| ---------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---- | ---- | ---- |
| v8               | 8.5 Collect Detailed Audit Logs<br/>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. |      | ●    | ●    |
| v7               | 14.9 Enforce Detail Logging for Access or Changes to Sensitive Data<br/>Enforce detailed audit logging for access to sensitive data or changes to sensitive data (utilizing tools such as File Integrity Monitoring or Security Information and Event Monitoring).                       |      |      | ●    |