Microsoft IIS WebDAV long invalid request denial of service
| iis-webdav-long-request-dos (6982) |  Low Risk |
Description:
Microsoft Internet Information Server (IIS) is vulnerable to a denial of service attack involving a specially-crafted WebDAV request. A remote attacker can send an overly long, specially-crafted request to the Web server, which would cause an access violation error, causing the service to fail. This vulnerability also causes the Web server to restart automatically, which disconnects any active sessions.
Platforms Affected:
- Microsoft, IIS 5.0
Remedy:
Apply the appropriate patch for your system, as listed in Microsoft Security Bulletin MS02-001. See References.
Note: Microsoft originally provided a patch for this vulnerability in MS01-044, but it has been superseded by the patch released with MS02-001. See References.
For IIS:
Note: Microsoft originally provided a patch for this vulnerability in MS01-044, but it has been superseded by the patch released with MS02-018 and MS02-062, and then superseded by the patch released with MS03-018. See References.
Consequences:
Denial of Service
References:
- CIAC Information Bulletin L-132, Microsoft Cumulative Patch for IIS at http://www.ciac.org/ciac/bulletins/l-132.shtml.
- Georgi Guninski Security Advisory #44, IIS 5.0 PROPFIND DOS #2 at http://www.guninski.com/iispropover2.html.
- Microsoft Knowledge Base Article 298340, Patch Available for WebDAV Denial of Service at http://support.microsoft.com/default.aspx?scid=kb;[LN];298340.
- Microsoft Security Bulletin MS01-044, 15 August 2001 Cumulative Patch for IIS at http://www.microsoft.com/technet/security/bulletin/ms01-044.mspx.
- Microsoft Security Bulletin MS02-001, Trusting Domains Do Not Verify Domain Membership of SIDs in Authorization Data at http://www.microsoft.com/technet/security/bulletin/ms02-001.mspx.
- Microsoft Security Bulletin MS02-018, Cumulative Patch for Internet Information Services (Q319733) at http://www.microsoft.com/technet/security/bulletin/ms02-018.mspx.
- Microsoft Security Bulletin MS02-062, Cumulative Patch for Internet Information Service (Q327696) at http://www.microsoft.com/technet/security/Bulletin/MS02-062.mspx.
- Microsoft Security Bulletin MS03-018, Cumulative Patch for Internet Information Service (811114) at http://www.microsoft.com/technet/security/bulletin/ms03-018.mspx.
- BID-2690: Microsoft IIS WebDAV Propfind Server Restart Vulnerability
- BID-2960: Transoft Broker .lnk Directory Traversal Vulnerability
- BID-3194: Microsoft IIS WebDAV Invalid Request Denial of Service Vulnerability
- CVE-2001-0508: Vulnerability in IIS 5.0 allows remote attackers to cause a denial of service (restart) via a long, invalid WebDAV request.
- OSVDB ID: 5606: Microsoft IIS WebDAV PROPFIND Request DoS
- OSVDB ID: 5633: Microsoft IIS Invalid WebDAV Request DoS
- US-CERT VU#959211: Microsoft IIS vulnerable to DoS via invalid request for very long WebDAV requests
Reported:
May 06, 2001
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