var-200204-0008
Vulnerability from variot

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. Intruders may be able to cause the IIS service to fail by sending a particular kind of overly-long URL. A vulnerability has been identified in the way Microsoft Internet Information Server handles URL errors. The ISAPI filter involved in this vulnerability is installed by Front Page Server Extensions and ASP.NET. On IIS 4.0 servers, the service must be manually restarted. On IIS 5.0 and 5.1 servers, the service will restart itself automatically. Custom ISAPI filters may also be affected by this condition. A number of Cisco products are affected by this vulnerability, although this issue is not present in the Cisco products themselves

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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.