The NetBIOS Name Server (NBNS) protocol does not perform authentication, which allows remote attackers to cause a denial of service by sending a spoofed Name Conflict or Name Release datagram, aka the "NetBIOS Name Server Protocol Spoofing" vulnerability.
http://www.nai.com/research/covert/advisories/044.asp
http://www.securityfocus.com/bid/1514
http://www.securityfocus.com/bid/1515
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-047
Source: MITRE
Published: 2000-07-27
Updated: 2018-10-12
Type: NVD-CWE-Other
Base Score: 5
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 10
Severity: MEDIUM