Ensure secure ICMP redirects are not accepted

DüşükDüzey 2Otomatikbottlerocket

Açıklama

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).

Nasıl denetlenir

Denetim yöntemi: Kabuk komutu

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

Beklenen çıktı: compliant

Nasıl düzeltilir

Düzeltme yöntemi: Kılavuz veya altyapı yaması

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

Özellikler

İşletim sistemleri: Herhangi biri
Etiketler: bottlerocketnetwork
Referans: CIS Bottlerocket Benchmark v1.0.0 - 3.2.3 Ensure secure ICMP redirects are not accepted

Bu ana makineyi denetle

Bunu denetleme izniniz olan bir makinede çalıştırın. Tarama salt okunurdur.

shell

tmaegis scan --target bottlerocket --level 2