Ensure that Linux kernel capabilities are restricted within containers

SedangLevel 1Otomatisdocker

Deskripsi

Containers should run with the minimum Linux capabilities; the benchmark specifically asks for NET_RAW to be dropped unless required. Flags containers whose CapDrop contains neither ALL nor NET_RAW (review CapAdd separately). The audit inspects every running container (docker ps -q) and prints the offending names; a host with no running containers is compliant.

Cara pemeriksaan

Metode audit: Perintah shell

shell

ids=$(docker ps -q) || exit 1; [ -z "$ids" ] && { echo compliant; exit 0; }; out=$(docker inspect --format '{{.Name}} {{range .HostConfig.CapDrop}}{{.}},{{end}}' $ids) || exit 1; bad=$(printf '%s\n' "$out" | awk 'toupper($0) !~ /(^| |,)(CAP_)?(ALL|NET_RAW),/ {print $1}'); [ -z "$bad" ] && echo compliant || printf '%s\n' "$bad"

Output yang diharapkan: compliant

Cara perbaikan

Metode perbaikan: Panduan atau patch infrastruktur

Run containers with --cap-drop=ALL (or at least --cap-drop=NET_RAW) and add back only required capabilities with --cap-add.

Properti

Sistem operasi: Apa saja
Tag: dockerruntime
Referensi: CIS Docker Benchmark v1.9.0 - 5.4 Ensure that Linux kernel capabilities are restricted within containers

Periksa host ini

Jalankan ini pada mesin yang diizinkan untuk Anda audit. Pemindaian bersifat hanya baca.

shell

tmaegis scan --target docker