Ensure krb5.conf does not permit DES, 3DES or RC4 encryption types

TinggiLevel 1Otomatiskerberos

Deskripsi

permitted_enctypes, default_tkt_enctypes and default_tgs_enctypes in /etc/krb5.conf control which session and ticket enctypes the KDC host and its clients negotiate. The audit fails if any of them names a des, des3, rc4 or arcfour type.

Cara pemeriksaan

Metode audit: Pola file

File: /etc/krb5.conf
Pola: (?mi)^\s*(permitted_enctypes|default_tkt_enctypes|default_tgs_enctypes)\s*=.*(des|rc4|arcfour)

Cara perbaikan

Metode perbaikan: Panduan atau patch infrastruktur

In [libdefaults] of /etc/krb5.conf remove weak types or set permitted_enctypes = aes256-cts-hmac-sha1-96 aes128-cts-hmac-sha1-96 (plus aes256-cts-hmac-sha384-192 aes128-cts-hmac-sha256-128 where supported). Verify that all clients and services have AES keys before deploying.

Properti

Sistem operasi: Apa saja
Tag: kerberoscrypto
Referensi: CIS MIT Kerberos / Linux Benchmark guidance - Strong Kerberos encryption types (verify section number for your release)

Periksa host ini

Jalankan ini pada mesin yang diizinkan untuk Anda audit. Pemindaian bersifat hanya baca.

shell

tmaegis scan --target kerberos