IIS 5.0 allows remote attackers to cause a denial of service via a series of malformed WebDAV requests.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A90
https://exchange.xforce.ibmcloud.com/vulnerabilities/6205
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-016