Sensitive host system directories should not be mounted on containers
Set up the docker integration.
Description
You should not allow sensitive host system directories such as those listed below to be mounted as container volumes, especially in read-write mode. / /boot /dev /etc /lib /proc /sys /usr
Rationale
If sensitive directories are mounted in read-write mode, it is possible to make changes to files within them. This has obvious security implications and should be avoided.
Audit
Run this command: docker ps --quiet --all | xargs docker inspect --format '{{ .Id }}: Volumes={{ .Mounts }}' This command returns a list of currently mapped directories and indicates whether they are mounted in read-write mode for each container instance.
Do not mount directories which are security sensitive on the host within containers, especially in read-write mode.
Impact
None
Default value
Docker defaults to using a read-write volume but you can also mount a directory read-only. By default, no sensitive host directories are mounted within containers.
References
- https://docs.docker.com/engine/tutorials/dockervolumes/
CIS controls
Version 6
14 Controlled Access Based on the Need to Know Controlled Access Based on the Need to Know
