The NETLOGON service in Microsoft Windows Server 2003 SP2, Windows Server 2008 SP2 and R2 SP1, and Windows Server 2012 Gold and R2, when a Domain Controller is configured, allows remote attackers to spoof the computer name of a secure channel's endpoint, and obtain sensitive session information, by running a crafted application and leveraging the ability to sniff network traffic, aka "NETLOGON Spoofing Vulnerability."
https://www.samba.org/samba/history/samba-4.2.10.html
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-027