Buffer overflow in ssinc.dll in IIS 5.0 and 4.0 allows local users to gain system privileges via a Server-Side Includes (SSI) directive for a long filename, which triggers the overflow when the directory name is added, aka the "SSI privilege elevation" vulnerability.
https://exchange.xforce.ibmcloud.com/vulnerabilities/6984
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-044
http://www.ciac.org/ciac/bulletins/l-132.shtml