Article ID: 276489
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We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 7.0 running on Microsoft Windows Server 2008. IIS 7.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:
http://www.microsoft.com/technet/security/prodtech/IIS.mspxFor more information about IIS 7.0, visit the following Microsoft Web site:
http://www.iis.net/default.aspx?tabid=1IMPORTANT: If you download and install the fix included in this article onto a computer running IIS 3.0, the IIS 3.0 Web, FTP, and Proxy services will fail. This fix should only be applied to computers running IIS 4.0 or later. To verify your version of IIS, follow these steps:
If the IIS Admin Service is not listed, your version of IIS is not vulnerable to the problem that is corrected by these fixes. Therefore, no action is needed. IIS 3.0 is not vulnerable and does not need this fix. If the IIS Admin Service is not listed, your version of IIS is not vulnerable to this particular problem that is corrected by these fixes. However, IIS 3 is no longer a supported product and has no security fixes for other problems.
A security vulnerability exists in Internet Information Services 5.0 and Internet Information Server 4.0 that may allow a malicious user to gain access to files and folders that are located on the logical drive containing the Web folders. This vulnerability can potentially allow a Web site visitor to take a wide range of destructive actions against it, including running programs on it.
This vulnerability is eliminated by the patch that accompanied the Microsoft File Permission Canonicalization Vulnerability
Customers who have applied the patch from MS00-057 are already protected against this vulnerability and do not need to take additional action. If you are using IIS 4.0 or IIS 5.0, Microsoft strongly urges you to apply the patch immediately, if you have not already done so. For more information about how to obtain this patch, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/269862/ )Patch released for canonicalization error issue
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Additional information about this issue is available from the following Microsoft Web site:
http://www.microsoft.com/technet/security/bulletin/MS00-086.mspxThe English version of the IIS 5.0 fix should have the following file attributes or later:
The English version of the IIS 4.0 fix should have the following file attributes or later:
Date Time Version Size File name ----------------------------------------------------- 08-09-2000 1:02pm 5.0.2195.2103 357,136 W3svc.dll
Date Time Size File name Platform --------------------------------------------------- 08/03/2000 05:06p 330,080 Asp.dll Intel 08/03/2000 05:04p 185,792 Infocomm.dll Intel 08/03/2000 05:05p 38,256 Ssinc.dll Intel 08/03/2000 05:05p 25,360 Sspifilt.dll Intel 08/03/2000 05:05p 228,496 W3svc.dll Intel 08/03/2000 05:08p 551,696 Asp.dll Alpha 08/03/2000 05:06p 304,912 Infocomm.dll Alpha 08/03/2000 05:07p 60,176 Ssinc.dll Alpha 08/03/2000 05:07p 39,696 Sspifilt.dll Alpha 08/03/2000 05:07p 384,272 W3svc.dll Alpha
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