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MS01-022: WebDAV Service Provider Can Allow Scripts to Levy Requests as a User
Article ID: 296441 - View products that this article applies to.
This article was previously published under Q296441
The Microsoft Data Access Component Internet Publishing Provider provides access to Web Distributed Authoring and Versioning (WebDAV) resources over the Internet. By design, it should differentiate between requests that are made by a user and those that are made by a script that is running in the user's browser. However, because of an implementation flaw, it handles all requests in the security context of the user. Therefore, if a user browses to a Web page or opens an HTML e-mail message that contains script, that script could access Web-based resources as the user.
The specific actions that a malicious user could take by using this vulnerability would depend on the Web-based resources that are available to the user, and on the user's privileges on those resources. However, it is likely that at a minimum, the malicious user could browse the user's intranet, and potentially access Web-based e-mail messages as well.
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that you determine are at risk of attack. Evaluate the computer's physical accessibility, network and Internet connectivity, and other factors to determine the degree of risk to the computer. See the associated Microsoft Security Bulletin
(http://www.microsoft.com/technet/security/bulletin/MS01-022.mspx)to help determine the degree of risk. This hotfix may receive additional testing. If the computer is sufficiently at risk, we recommend that you apply this hotfix now.
To resolve this problem immediately, download the hotfix by following the instructions later in this article or contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=supportNote In special cases, charges that are ordinarily incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question. You can install this patch on any of the following operating systems:
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
Download Rbupdate.exe now
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119591Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file. The English version of this fix should have the following file attributes or later:
(http://support.microsoft.com/kb/119591/EN-US/ )How to Obtain Microsoft Support Files from Online Services
Date Time Version Size File name ------------------------------------------------------ 04/05/2001 12:45p 8.102.4004.0 561,152 Msdaipp.10 04/04/2001 05:59p 8.103.4004.0 573,440 Msdaipp.15 04/08/2001 01:10p 45,056 Rb_inst.exe
Microsoft has confirmed that this problem may cause a degree of security vulnerability in the Microsoft products that are listed at the beginning of this article.
For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:
265173For additional information about how to install multiple hotfixes with only one reboot, click the article number below to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/265173/EN-US/ )The Datacenter Program and Windows 2000 Datacenter Server Product
296861To determine if your computer is vulnerable, find the Msdaipp.dll file on your computer. If this file is not present, your computer is not affected by this vulnerability and you do not need the patch. If this file is present, right-click the file, click Properties, click the Version tab, and then compare the version to the versions that are listed below:
(http://support.microsoft.com/kb/296861/EN-US/ )Use QChain.exe to Install Multiple Hotfixes with One Reboot
For more information about this vulnerability, see the following Microsoft Web site:
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Article ID: 296441 - Last Review: March 29, 2007 - Revision: 5.3