Bottlerocket
TMA-BOTTLEROCKET-3.2.3
Ensure secure ICMP redirects are not accepted
Описание
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).
Как проверяется
Метод проверки: Команда оболочки
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- Ожидаемый вывод
compliant
Как исправляется
Метод исправления: Рекомендация или патч инфраструктуры
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
Свойства
- Операционные системы
- Любая
- Теги
- bottlerocketnetwork
- Источник
- CIS Bottlerocket Benchmark v1.0.0 - 3.2.3 Ensure secure ICMP redirects are not accepted
Проверить этот хост
Выполните команду на компьютере, аудит которого вам разрешён. Сканирование работает только на чтение.
tmaegis scan --target bottlerocket --level 2