CVE-1999-1148
FTP service in IIS 4.0 and earlier allows remote attackers to cause a denial of service (resource exhaustion) via many passive (PASV) connections at the same time.
Date published : 2002-03-09
https://docs.microsoft.com/en-us/security-updates/securitybulletins/1998/ms98-006
http://support.microsoft.com/support/kb/articles/Q189/2/62.ASP