Related Vulnerabilities: CVE-2021-3671  

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.

Severity Low

Remote Yes

Type Denial of service

Description

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.

AVG-2418 samba 4.14.7-2 4.15.0-1 Low Fixed

https://www.samba.org/samba/history/samba-4.15.0.html