Microsoft Security Bulletin MS03-007 815021

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• Price: Update
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• Date added: March 16, 2003
• Total Downloads: 42
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Microsoft Windows 2000 supports the World Wide Web Distributed Authoring and Versioning (WebDAV) protocol. WebDAV, defined in RFC 2518, is a set of extensions to the Hyper Text Transfer Protocol (HTTP) that provide a standard for editing and file management between computers on the Internet. A security vulnerability is present in a Windows component used by WebDAV, and results because the component contains an unchecked buffer.

An attacker could exploit the vulnerability by sending a specially formed HTTP request to a machine running Internet Information Server (IIS). The request could cause the server to fail or to execute code of the attacker?s choice. The code would run in the security context of the IIS service (which, by default, runs in the LocalSystem context).

Although Microsoft has supplied a patch for this vulnerability and recommends customers install the patch immediately, additional tools and preventive measures have been provided that customers can use to block the exploitation of this vulnerability while they are assessing the impact and compatibility of the patch. These temporary workarounds and tools are discussed in the ?Workarounds? section in the FAQ below.

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