DOCUMENT:Q294472 08-MAY-2002 [iis] TITLE :MS99-057: Index Server Search Function Contains Unchecked Buffer PRODUCT :Internet Information Server PROD/VER::2.0 OPER/SYS: KEYWORDS:kbSecurity kbWinNT400PreSP7Fix kbgraphxlinkcritical ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Index Server version 2.0 ------------------------------------------------------------------------------- SYMPTOMS ======== Index Server 2.0 has an unchecked buffer in a function that processes search requests. If an overly long value is provided for a particular search parameter, it overruns the buffer. If the buffer is overrun with random data, it causes Index Service to fail. If it is overrun with carefully selected data, code of the attacker's choice can be made to run on the server in the Local System security context. Mitigating Factors: - To exploit the vulnerability, the attacker must be able to authenticate to the server and to create a named pipe connection to it (which requires access to NetBIOS, which should be blocked at the firewall). As a result, it is likely that this vulnerability can, in a properly configured network, only be exploited by an intranet user. - Index Server 2.0 installs by default as part of the Microsoft Windows NT 4.0 Option Pack, but it does not run by default. - Indexing Services in Microsoft Windows 2000 is not affected by this vulnerability. RESOLUTION ========== Windows NT 4.0 -------------- To resolve this problem, obtain the individual package referenced below or obtain the Windows NT 4.0 Security Rollup Package. For additional information on the SRP, click the article number below to view the article in the Microsoft Knowledge Base: Q299444 Post-Windows NT 4.0 Service Pack 6a Security Rollup Package (SRP) The following file is available for download from the Microsoft Download Center: DownloadDownload Q294472i.exe now (http://www.microsoft.com/ntserver/nts/downloads/critical/q294472/default.asp) For additional information about how to download Microsoft Support files, click the article number below to view the article in the Microsoft Knowledge Base: Q119591 How to Obtain Microsoft Support Files from Online Services Microsoft used the most current virus detection software available on the date of posting to scan this file for viruses. After it is posted, the file is housed on secure servers that prevent any unauthorized changes to the file. The English version of this fix should have the following file attributes or later: Date Time Version Size File name -------------------------------------------------- 04/10/2001 06:19p 5.0.1781.3 870,672 Query.dll NOTE: Due to file dependencies, this hotfix requires Microsoft Windows NT 4.0 Service Pack 4 or later. Microsoft Windows NT Server version 4.0, Terminal Server Edition ---------------------------------------------------------------- To resolve this problem, obtain the Windows NT Server 4.0, Terminal Server Edition, Security Rollup Package (SRP). For additional information about the SRP, click the article number below to view the article in the Microsoft Knowledge Base: Q317636 Windows NT Server 4.0, Terminal Server Edition, Security Rollup Package STATUS ====== Microsoft has confirmed that this problem could result in some degree of security vulnerability in Index Server 2.0. MORE INFORMATION ================ For more information about this vulnerability, see the following Microsoft Web site: http://www.microsoft.com/technet/security/bulletin/MS01-025.asp Additional query words: security_patch ====================================================================== Keywords : kbSecurity kbWinNT400PreSP7Fix kbgraphxlinkcritical Technology : kbIdxServSearch kbAudDeveloper kbIdxServ200 Version : :2.0 Hardware : ALPHA x86 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.