cbcvebase.
CVE-2002-0072
published 2002-04-22

CVE-2002-0072: 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…

PriorityP423medium5CVSS 2.0
AVNACLAuNCNINAP
EPSS
53.29%
98.9th percentile
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.

Affected

3 ranges
VendorProductVersion rangeFixed in
ciscoproducts_ms02-018
microsoftinternet_information_server
microsoftinternet_information_services

Detection & IOCsextracted from sources · hover to see the quote

  • Target the w3svc.dll ISAPI filter in IIS 4.0, 5.0, and 5.1 — a remotely triggered null pointer dereference via an excessively long URL causes a denial of service (crash)
  • Monitor inbound HTTP requests with abnormally long URLs targeting IIS servers running Front Page Server Extensions or ASP.NET; a crash/restart of w3svc (World Wide Web Publishing Service) following such a request is a strong indicator of exploitation
  • ·The vulnerability is in IIS itself (w3svc.dll ISAPI filter), not in any Cisco product or application installed on top of IIS; Cisco products are affected only because they run on Windows hosts with IIS enabled
  • ·Affected IIS versions are 4.0, 5.0, and 5.1 with Front Page Server Extensions or ASP.NET installed; detection rules should scope to these versions
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