TMAegis
Другие правила для bind

TMA-BIND-4.3

Use Unique Keys for Each Pair of Hosts

СреднийУровень 1Автоматическаяbind

Описание

A unique TSIG key should be used for each pair of communicating hosts. For example, if there is one master authoritative name server and three slave authoritative name servers that were updated by the master, then there would need to be a unique TSIG key for at least the following: ; Master <-> Slave1 ; Master <-> Slave2 ; Master <-> Slave3 The audit requires every key secret and key name in the effective configuration to be unique. The audit parses the effective configuration printed by named-checkconf -p (all include files resolved) from /etc/named.conf (RHEL; chroot /var/named/chroot is detected) or /etc/bind/named.conf (Debian/Ubuntu).

Как проверяется

Метод проверки: Команда оболочки

shell
if [ -f /var/named/chroot/etc/named.conf ]; then out=$(named-checkconf -t /var/named/chroot -p /etc/named.conf 2>/dev/null) || exit 1
else conf=/etc/named.conf; [ -f "$conf" ] || conf=/etc/bind/named.conf
  out=$(named-checkconf -p "$conf" 2>/dev/null) || exit 1; fi
flat=$(printf '%s\n' "$out" | tr '\t\n' '  ' | tr -s ' ')
opts=$(printf '%s\n' "$out" | awk '/^options[ \t]*\{/{f=1} f{print} f&&/^\};/{exit}' | tr '\t\n' '  ' | tr -s ' ')
d=$(printf '%s\n' "$flat" | grep -Eo 'secret "[^"]*"' | sort | uniq -d | wc -l)
n=$(printf '%s\n' "$flat" | grep -Eo 'key "?[^ "]+"? \{ *algorithm' | sort | uniq -d | wc -l)
[ "$d" -eq 0 ] && [ "$n" -eq 0 ] && echo compliant || echo "duplicate key secrets: $d, duplicate key names: $n"
Ожидаемый вывод
compliant

Как исправляется

Метод исправления: Рекомендация или патч инфраструктуры

Generate unique keys for host to host communication. The command below can be used to generate 2 files, a <name>.key file and a <name>.private file with secret keys of suitable length with base64 encoding. The files themselves are not needed, and should be securely deleted once the values are copied into a key file for including in the named configuration. $ dnssec-keygen -a HMAC-SHA256 -b 256 -n HOST ns1-ns2.cisecurity.org Kns1-ns2.cisecurity.org.+163+13013 $ cat Kns1-ns2.cisecurity.org.+163+13013.key ns1-ns2.cisecurity.org. IN KEY 512 3 163 9FQ2dYCQ17HJwDi/uHgANh2dlb8M7eb+F4AjML8tTdA=

Свойства

Операционные системы
Любая
Теги
binddnstsig
Источник
CIS ISC BIND DNS Server 9.11 Benchmark v1.0.0 - 4.3 Use Unique Keys for Each Pair of Hosts

Проверить этот хост

Выполните команду на компьютере, аудит которого вам разрешён. Сканирование работает только на чтение.

shell
tmaegis scan --target bind