Ensure sensitive host system directories are not mounted on containers

AltaNivel 1Automatizadadocker

Descripción

Mounting host system directories (/, /boot, /dev, /etc, /lib, /proc, /sys, /usr) lets a container read or change the host. Flags those directories mounted in any mode, and anything below them mounted read-write. The audit inspects every running container (docker ps -q) and prints the offending names; a host with no running containers is compliant.

Cómo se verifica

Método de auditoría: Comando de shell

shell

ids=$(docker ps -q) || exit 1; [ -z "$ids" ] && { echo compliant; exit 0; }; out=$(docker inspect --format '{{.Name}} {{range .Mounts}} {{.Source}}|{{.RW}}{{end}}' $ids) || exit 1; bad=$(printf '%s\n' "$out" | awk '{for(i=2;i<=NF;i++){split($i,a,"|"); if(a[1] ~ /^\/(boot|dev|etc|lib|proc|sys|usr)?$/ || (a[2]=="true" && a[1] ~ /^\/(boot|dev|etc|lib|proc|sys|usr)\//)) print $1" "a[1]}}'); [ -z "$bad" ] && echo compliant || printf '%s\n' "$bad"

Salida esperada: compliant

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

Redeploy the container without bind mounts of sensitive host directories; if a file is truly needed, mount only that file read-only (-v /etc/foo:/etc/foo:ro).

Propiedades

Sistemas operativos: Cualquiera
Etiquetas: dockerruntime
Referencia: CIS Docker Benchmark v1.9.0 - 5.6 Ensure sensitive host system directories are not mounted on containers

Verificar este host

Ejecute esto en un equipo que tenga permiso para auditar. El escaneo es de solo lectura.

shell

tmaegis scan --target docker