Ensure secure ICMP redirects are not accepted

НискаНиво 2Аутоматскаbottlerocket

Опис

Secure ICMP redirects are the same as ICMP redirects, except they come from gateways listed on the default gateway list. It is assumed that these gateways are known to your system, and that they are likely to be secure. The audit reads the running values from /proc/sys. Run tmaegis on the host through the admin container root shell (sudo sheltie).

Како се проверава

Метод провере: Команда љуске

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 $2)"; bad=1; }; }
chk net.ipv4.conf.all.secure_redirects 0
chk net.ipv4.conf.default.secure_redirects 0
[ "$bad" -eq 0 ] && echo compliant

Очекивани излаз: compliant

Како се исправља

Метод исправке: Смерница или закрпа инфраструктуре

Run the following command to set the active kernel parameters and persist the settings: # apiclient apply <<EOF [settings.kernel.sysctl] "net.ipv4.conf.all.secure_redirects" = "0" "net.ipv4.conf.default.secure_redirects" = "0" EOF Run the following command to flush the routing cache: # sysctl -w net.ipv4.route.flush=1

Својства

Оперативни системи: Било који
Ознаке: bottlerocketnetwork
Референца: CIS Bottlerocket Benchmark v1.0.0 - 3.2.3 Ensure secure ICMP redirects are not accepted

Проверите овај рачунар

Покрените ово на рачунару за који имате дозволу за проверу. Скенирање ради у режиму само за читање.

shell

tmaegis scan --target bottlerocket --level 2