When IIS 2 or 3 is upgraded to IIS 4, ism.dll is inadvertently left in /scripts/iisadmin, which does not restrict access to the local machine and allows an unauthorized user to gain access to sensitive server information, including the Administrators password.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Internet_information_server | Microsoft | 4.0 (including) | 4.0 (including) |