In Samba before version 4.15.0, an unauthenticated user can crash the AD DC KDC by omitting the server name in a TGS-REQ.
In Samba before version 4.15.0, an unauthenticated user can crash the AD DC KDC by omitting the server name in a TGS-REQ.
https://www.samba.org/samba/history/samba-4.15.0.html