| Package | Affected versions | Patched versions |
|---|---|---|
| internet information server | = 4.0 | |
| internet information services | = 5.0 |
The w3svc.dll ISAPI filter in Front Page Server Extensions and ASP.NET for Internet Information Server (IIS) 4.0, 5.0, and 5.1 does not properly handle the error condition when a long URL is provided, which allows remote attackers to cause a denial of service (crash) when the URL parser accesses a null pointer.
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