Ensure user namespaces are disabled

NiskaNivo 2Automatskabottlerocket

Opis

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).

Kako se proverava

Metod provere: Komanda ljuske

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

Očekivani izlaz: compliant

Kako se ispravlja

Metod ispravke: Smernica ili zakrpa infrastrukture

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

Svojstva

Operativni sistemi: Bilo koji
Oznake: bottlerocketsystem
Referenca: CIS Bottlerocket Benchmark v1.0.0 - 1.4.4 Ensure user namespaces are disabled

Proverite ovaj računar

Pokrenite ovo na računaru za koji imate dozvolu za proveru. Skeniranje radi u režimu samo za čitanje.

shell

tmaegis scan --target bottlerocket --level 2