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Microsoft Windows 2000 "SNMP Parameters" Vulnerability



Microsoft Windows 2000 "SNMP Parameters" Vulnerability Privacy and Legal Notice

CIAC INFORMATION BULLETIN

L-027: Microsoft Windows 2000 "SNMP Parameters" Vulnerability

December 13, 2000 00:00 GMT
PROBLEM:       The SNMP parameters have default permissions that are
               inappropriately set.
PLATFORM:      Microsoft Windows 2000 Professional
               Microsoft Windows 2000 Server
               Microsoft Windows 2000 Advanced Server
DAMAGE:        The default permissions could allow a malicious user to monitor
               or reconfigure certain devices on a network.
SOLUTION:      Apply the patch indicated below.

VULNERABILITY The risk is LOW. The information revealed by this vulnerability ASSESSMENT: is normally transmitted in plaintext across SNMP-management network.
[****** Start Microsoft Security Bulletin ******] Microsoft Security Bulletin (MS00-096) Tool Available for "SNMP Parameters" Vulnerability Originally posted: December 06, 2000 Summary Microsoft has released a tool that corrects the permissions on several registry values in Microsoft(r) Windows(r) 2000. The default permissions could allow a malicious user to monitor or reconfigure certain devices on a network. Frequently asked questions regarding this vulnerability and the patch can be found at http://www.microsoft.com/technet/security/bulletin/fq00-096.asp Issue This vulnerability is virtually identical to the "SNMP Parameters" vulnerability affecting Windows NT(r) 4.0 systems and discussed in Microsoft Security Bulletin MS00-095. The registry key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SNMP\Parameters provides the SNMP community name and SNMP management station identifiers, if they exist. Reading this information would enable a malicious user to pose as a bona fide SNMP manager for any community her machine belonged to. Changing this information would enable her to create a community consisting solely of her local machine, as a way of gaining management privileges on it. It should be noted that the information revealed by this vulnerability is normally transmitted in plaintext across SNMP-managed networks. As a result, even in the absence of incorrect registry permissions, a malicious user could carry out the same attack if she could monitor network communications. SNMP is not installed on Windows 2000 machines by default. Affected Software Versions Microsoft Windows 2000 Professional Microsoft Windows 2000 Server Microsoft Windows 2000 Advanced Server Patch Availability http://www.microsoft.com/Downloads/Release.asp?ReleaseID=24500 Note: The Security Configuration and Analysis template provided in the patch can be applied to any Windows 2000 system. 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 MS00-096, http://www.microsoft.com/technet/security/bulletin/fq00-096.asp Microsoft Security Bulletin MS00-095, Microsoft Security Bulletin http://www.microsoft.com/technet/security/bulletin/MS00-095.asp Microsoft Knowledge Base article Q266794 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 Chris Anley of @stake (http://www.atstake.com) for reporting this issue to us and working with us to protect customers Revisions December 06, 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. [****** END Microsoft Security Bulletin ******]

CIAC wishes to acknowledge the contributions of Microsoft Corporation for the information contained in this bulletin.

CIAC services are available to DOE, DOE Contractors, and the NIH. CIAC can be contacted at:
    Voice:          +1 925-422-8193 (7 x 24)
    FAX:            +1 925-423-8002
    STU-III:        +1 925-423-2604
    E-mail:          ciac@llnl.gov
    World Wide Web:  http://www.ciac.org/
                     http://ciac.llnl.gov
                     (same machine -- either one will work)
    Anonymous FTP:   ftp.ciac.org
                     ciac.llnl.gov
                     (same machine -- either one will work)

This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes.
UCRL-MI-119788
[Privacy and Legal Notice]


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