| Security Updates |
Microsoft Security Bulletin (MS98-012)Updates available for Security Vulnerabilities in Microsoft PPTPOriginally Posted: August 18, 1998Last Revised: August 18, 1998
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| Summary Microsoft has released a set of patches that fix several security issues with implementations of the Point-to-Point Tunneling Protocol (PPTP) used in Microsoft Virtual Private Networking (VPN) products. Customers using affected software listed below to secure communcations over a public network (i.e. the Internet) should download and apply these patches as soon as possible. Customers who are not using PPTP for network security are not affected by this issue. The Microsoft implementation of PPTP uses MS-CHAP for user authentication and Microsoft Point-to-Point Encryption (MPPE) to protect the confidentiality of user data. Potential vulnerabilities addressed by these updates include:
While there have not been any reports of customers being adversely affected by these problems, Microsoft is releasing these patches to address the implied risks posed by these issues. The following software is affected by this vulnerability:
On August 18th Microsoft released a set of patches that fix the problems identified. These patches are available for download by Windows NT, Windows 95 and Windows 98 customers from the Microsoft FTP site. Microsoft has sent this security bulletin to customers subscribing to the Microsoft Product Security Notification Service (see http://www.microsoft.com/security/bulletin.htm for more information about this free customer service). Microsoft has published the following Knowledge Base (KB) articles on this issue:
Microsoft highly recommends that users of affected software versions, listed in the "Affected Software Versions" section above, should download the appropriate patch. Complete URLs for each affected software version is given below.
NOTE: The above link has been wrapped for readability.
NOTE: The above link has been wrapped for readability.
Strong Encryption Versions (128-bit) Customers in the United States and Canada can download the strong encryption versions of these updates from: http://mssecure.www.conxion.com/cgi-bin/ntitar.pl Please see the following references for more information related to this issue.
For additional security-related information about Microsoft products, please visit http://www.microsoft.com/security 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. (c) 1998 Microsoft and/or its suppliers. All rights reserved. For Terms of Use see http://support.microsoft.com/support/misc/cpyright.asp. You have received this e-mail bulletin as a result of your registration to the Microsoft Product Security Notification Service. You may unsubscribe from this e-mail notification service at any time by sending an e-mail to microsoft_security-signoff-request@announce.microsoft.com The subject line and message body are not used in processing the request, and can be anything you like. For more information on the Microsoft Security Notification Service please visit http://www.microsoft.com/security/bulletin.htm. For security-related information about Microsoft products, please visit the Microsoft Security Advisor web site at http://www.microsoft.com/security. |