Ensure user namespaces are disabled

RendahLevel 2Otomatisbottlerocket

Deskripsi

User namespaces should be disabled unless required. Note that user namespaces can be necessary in environments where containers running as unprivileged users are meant to run other containers. These are often referred to as "rootless" containers. The audit reads /proc/sys/user/max_user_namespaces and requires 0. Run tmaegis on the host through the admin container root shell (sudo sheltie).

Cara pemeriksaan

Metode audit: Perintah shell

shell

bad=0
chk() { f=/proc/sys/$(printf %s "$1" | tr . /); v=$(cat "$f" 2>/dev/null) || { echo "$1: not readable"; bad=1; return; }; [ "$v" = "$2" ] || { echo "$1 = $v (expected $2)"; bad=1; }; }
chk user.max_user_namespaces 0
[ "$bad" -eq 0 ] && echo compliant

Output yang diharapkan: compliant

Cara perbaikan

Metode perbaikan: Panduan atau patch infrastruktur

Run the following command to set the active kernel parameter and persist the setting: # apiclient apply <<EOF [settings.kernel.sysctl] "user.max_user_namespaces" = "0" EOF

Properti

Sistem operasi: Apa saja
Tag: bottlerocketsystem
Referensi: CIS Bottlerocket Benchmark v1.0.0 - 1.4.4 Ensure user namespaces are disabled

Periksa host ini

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

shell

tmaegis scan --target bottlerocket --level 2