Buffer overflow in the ism.dll ISAPI extension that implements HTR scripting in Internet Information Server (IIS) 4.0 and 5.0 allows attackers to cause a denial of service or execute arbitrary code via HTR requests with long variable names.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A45
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A130
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2002/ms02-018
http://www.securityfocus.com/bid/4474
http://www.kb.cert.org/vuls/id/363715
http://www.iss.net/security_center/static/8799.php
http://www.cisco.com/warp/public/707/Microsoft-IIS-vulnerabilities-MS02-018.shtml
http://www.cert.org/advisories/CA-2002-09.html
http://www.atstake.com/research/advisories/2002/a041002-1.txt