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

VisokaNivo 1Automatskakerberos

Opis

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.

Kako se proverava

Metod provere: Obrazac u datoteci

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

Kako se ispravlja

Metod ispravke: Smernica ili zakrpa infrastrukture

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.

Svojstva

Operativni sistemi: Bilo koji
Oznake: kerberoscrypto
Referenca: CIS MIT Kerberos / Linux Benchmark guidance - Strong Kerberos encryption types (verify section number for your release)

Proverite ovaj računar

Pokrenite ovo na računaru za koji imate dozvolu za proveru. Skeniranje radi u režimu samo za čitanje.

shell

tmaegis scan --target kerberos