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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2000.191 -- Microsoft Security Bulletin (MS00-053) Patch Available for "Service Control Manager Named Pipe Impersonation" Vulnerability 3 August 2000 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Service Control Manager Vendor: Microsoft Operating System: Windows 2000 Platform: N/A Impact: Administrator Compromise Access Required: Local, Existing Account - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Microsoft Security Bulletin (MS00-053) - - -------------------------------------- Patch Available for "Service Control Manager Named Pipe Impersonation" Vulnerability Originally posted: August 02, 2000 Summary ======= Microsoft has released a patch that eliminates a security vulnerability in Microsoft(r) Windows 2000(r). The vulnerability could allow a user logged onto a Windows 2000 machine from the keyboard to become an administrator on the machine. Frequently asked questions regarding this vulnerability and the patch can be found at http://www.microsoft.com/technet/security/bulletin/fq00-053.asp Issue ===== The Service Control Manager (services.exe) is an administrative tool provided in Windows 2000 that allows system services (Server, Workstation, Alerter, ClipBook, etc.) to be created or modified. The SCM creates a named pipe for each service as it starts, however, should a malicious program predict and create the named pipe for a specific service before the service starts, the program could impersonate the privileges of the service. This could allow the malicious program to run in the context of the given service, with either specific user or LocalSystem privileges. The primary risk from this vulnerability is that a malicious user could exploit this vulnerability to gain additional privileges on the local machine. A malicious user would require the ability to log onto the target machine interactively and run arbitrary programs in order to exploit this vulnerability, and as a result, workstations and terminal servers would be at greatest risk. Affected Software Versions ========================== - Microsoft Windows 2000 Professional - Microsoft Windows 2000 Server - Microsoft Windows 2000 Advanced Server Patch Availability ================== - Windows 2000: http://www.microsoft.com/Downloads/Release.asp?ReleaseID=23432 Note: Additional security patches are available at the Microsoft Download Center More Information ================ Please see the following references for more information related to this issue. - Frequently Asked Questions: Microsoft Security Bulletin MS00-053, http://www.microsoft.com/technet/security/bulletin/fq00-053.asp - Microsoft Knowledge Base article Q269523 discusses this issue and will be available soon. - Microsoft TechNet Security web site, http://www.microsoft.com/technet/security/default.asp Obtaining Support on this Issue =============================== This is a fully supported patch. Information on contacting Microsoft Product Support Services is available at http://support.microsoft.com/support/contact/default.asp. Acknowledgments =============== Microsoft thanks the R&D department of Guardent (www.guardent.com) for reporting this issue to us and working with us to protect customers. Revisions ========= August 02, 2000: Bulletin Created. - - ---------------------------------------------------------------------- - - --------------------------- 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. Last Updated August 2, 2000 (c) 2000 Microsoft Corporation. All rights reserved. Terms of use. - -----BEGIN PGP SIGNATURE----- Version: PGP Personal Privacy 6.5.3 iQEVAwUBOYhKu40ZSRQxA/UrAQEqyggAocFJQiC3xFHLvMyu/9LzklVL9L/Rk0bp exroLjvfp6o/J4Umw+edjyzqkw5dUhBDev3Ud75w8CMtaRN4xGCaYWVCEDp5MEG+ 29y60VWoxK3A0wYbLy8VzP2DKqA0A+hzDJzEZ+u1nDrtRCjJLhm1TjlpFiGb2lRV rpRHNA7CPFecvjtnv9asGNm49uL/kHq7Ox3ojjcUOzTrrCKH265qFMyr0qpyy7CW eORJF6ZZNcPanRZCH/5A1mEU7QLRJsfhQ+OrjCJkjKheNo80TiR9p1Yb7+RcV//8 +TR8Ux+adBgwXW4+AHUtBnsLDFt728LLUAkw51LXPwiPaTsETrrViw== =B/7D - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to use any or all of this information is the responsibility of each user or organisation, and should be done so in accordance with site policies and procedures. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the original authors to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/Information/advisories.html If you believe that your system has been compromised, contact AusCERT or your representative in FIRST (Forum of Incident Response and Security Teams). Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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