Microsoft Internet Information Server WebDAV multiple attributes per XML elements cause denial of service
| iis-webdav-xml-attribute-dos (17645) |  Medium Risk |
Description:
Microsoft Internet Information Server (IIS) is vulnerable to a denial of service attack when IIS is running WebDAV. WebDAV (Web Distributed Authoring and Versioning) is an extension to HTTP that allows users to create, edit, and share various documents over the Internet or an intranet. A remote attacker can send a specially-crafted WebDAV request containing multiple attributes per XML element to the Web server, which would cause the IIS service to stop responding.
Consequences:
Denial of Service
Remedy:
Apply the appropriate patch for your system, as listed in Microsoft Security Bulletin MS04-030. See References.
References:
- BugTraq Mailing List, Tue Oct 12 2004 - 13:31:28 CDT: Microsoft IIS 5.x/6.0 WebDAV (XML parser) attribute blowup DoS.
- Microsoft Security Bulletin MS04-030: Vulnerability in WebDav XML Message Handler Could Lead to a Denial of Service (824151).
- BID-11384: Microsoft XML Parser Remote Denial of Service Vulnerability
- CVE-2003-0718: The WebDAV Message Handler for Internet Information Services (IIS) 5.0, 5.1, and 6.0 allows remote attackers to cause a denial of service (memory and CPU exhaustion, application crash) via a PROPFIND request with an XML message containing XML elements with a large number of attributes.
Platforms Affected:
- Microsoft IIS 6.0
- Microsoft Internet Information Server 5.0
- Microsoft Internet Information Server 5.1
- Microsoft Windows 2000 SP4
- Microsoft Windows 2000 SP3
- Microsoft Windows 2003 Server
- Microsoft Windows 2003 Server x64
- Microsoft Windows XP 2003 x64
- Microsoft Windows XP SP1
- Microsoft Windows XP SP1 x64
Reported:
Oct 12, 2004
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
For corrections or additions please email xforce@iss.net