# Docker Bench for Security ![Docker Bench for Security running](https://raw.githubusercontent.com/docker/docker-bench-security/master/benchmark_log.png) The Docker Bench for Security is a script that checks for dozens of common best-practices around deploying Docker containers in production. The tests are all automated, and are inspired by the [CIS Docker Benchmark v1.2.0](https://www.cisecurity.org/benchmark/docker/). We are making this available as an open-source utility so the Docker community can have an easy way to self-assess their hosts and docker containers against this benchmark. ## Running Docker Bench for Security We packaged docker bench as a small container for your convenience. Note that this container is being run with a *lot* of privilege -- sharing the host's filesystem, pid and network namespaces, due to portions of the benchmark applying to the running host. The easiest way to run your hosts against the Docker Bench for Security is by running our pre-built container: ```sh docker run --rm --net host --pid host --userns host --cap-add audit_control \ -e DOCKER_CONTENT_TRUST=$DOCKER_CONTENT_TRUST \ -v /etc:/etc:ro \ -v /usr/bin/containerd:/usr/bin/containerd:ro \ -v /usr/bin/runc:/usr/bin/runc:ro \ -v /usr/lib/systemd:/usr/lib/systemd:ro \ -v /var/lib:/var/lib:ro \ -v /var/run/docker.sock:/var/run/docker.sock:ro \ --label docker_bench_security \ docker/docker-bench-security ``` Don't forget to adjust the shared volumes according to your operating system. Some examples are: 1. `Docker Desktop` on macOS doesn't have `/usr/lib/systemd` or the above Docker binaries. ```sh docker run --rm --net host --pid host --userns host --cap-add audit_control \ -e DOCKER_CONTENT_TRUST=$DOCKER_CONTENT_TRUST \ -v /etc:/etc \ -v /var/lib:/var/lib:ro \ -v /var/run/docker.sock:/var/run/docker.sock:ro \ --label docker_bench_security \ docker/docker-bench-security ``` 2. On Ubuntu the `docker.service` and `docker.secret` files are located in `/lib/systemd/system` folder by default. ```sh docker run --rm --net host --pid host --userns host --cap-add audit_control \ -e DOCKER_CONTENT_TRUST=$DOCKER_CONTENT_TRUST \ -v /etc:/etc:ro \ -v /lib/systemd/system:/lib/systemd/system:ro \ -v /usr/bin/containerd:/usr/bin/containerd:ro \ -v /usr/bin/runc:/usr/bin/runc:ro \ -v /usr/lib/systemd:/usr/lib/systemd:ro \ -v /var/lib:/var/lib:ro \ -v /var/run/docker.sock:/var/run/docker.sock:ro \ --label docker_bench_security \ docker/docker-bench-security ``` Docker bench requires Docker 1.13.0 or later in order to run. Note that when distributions don't contain `auditctl`, the audit tests will check `/etc/audit/audit.rules` to see if a rule is present instead. Distribution specific Dockerfiles that fix these issues are available in the [distros directory](https://github.com/docker/docker-bench-security/tree/master/distros). The [distribution specific Dockerfiles](https://github.com/docker/docker-bench-security/tree/master/distros) may also help if the distribution you're using hasn't yet shipped Docker version 1.13.0 or later. ### Docker Bench for Security options ```sh -b optional Do not print colors -h optional Print this help message -l FILE optional Log output in FILE inside docker bench container -c CHECK optional Comma delimited list of specific check(s) -e CHECK optional Comma delimited list of specific check(s) to exclude -i INCLUDE optional Comma delimited list of patterns within a container or image name to check -x EXCLUDE optional Comma delimited list of patterns within a container or image name to exclude from check ``` By default the Docker Bench for Security script will run all available CIS tests and produce logs in the current directory inside the container, named `docker-bench-security.sh.log.json` and `docker-bench-security.sh.log`. The CIS based checks are named `check_
_`, e.g. `check_2_6` and community contributed checks are named `check_c_`. A complete list of checks is present in [functions_lib.sh](functions_lib.sh). `sh docker-bench-security.sh -l /tmp/docker-bench-security.sh.log -c check_2_2` will only run check `2.2 Ensure the logging level is set to 'info'`. `sh docker-bench-security.sh -l /tmp/docker-bench-security.sh.log -e check_2_2` will run all available checks except `2.2 Ensure the logging level is set to 'info'`. `sh docker-bench-security.sh -l /tmp/docker-bench-security.sh.log -e docker_enterprise_configuration` will run all available checks except the docker_enterprise_configuration group `sh docker-bench-security.sh -l /tmp/docker-bench-security.sh.log -e docker_enterprise_configuration,check_2_2` will run all available checks except the docker_enterprise_configuration group and `2.2 Ensure the logging level is set to 'info'` `sh docker-bench-security.sh -l /tmp/docker-bench-security.sh.log -c container_images -e check_4_5` will run just the container_images checks except `4.5 Ensure Content trust for Docker is Enabled` Note that when submitting checks, provide information why it is a reasonable test to add and please include some kind of official documentation verifying that information. ## Building Docker Bench for Security If you wish to build and run this container yourself, you can follow the following steps: ```sh git clone https://github.com/docker/docker-bench-security.git cd docker-bench-security docker build --no-cache -t docker-bench-security . ``` followed by an appropriate `docker run` command as stated above or use [Docker Compose](https://docs.docker.com/compose/): ```sh git clone https://github.com/docker/docker-bench-security.git cd docker-bench-security docker-compose run --rm docker-bench-security ``` Also, this script can also be simply run from your base host by running: ```sh git clone https://github.com/docker/docker-bench-security.git cd docker-bench-security sudo sh docker-bench-security.sh ``` This script was built to be POSIX 2004 compliant, so it should be portable across any Unix platform.