From secnotif@MICROSOFT.COM Fri Jul 27 14:52:54 2001 From: Microsoft Product Security To: MICROSOFT_SECURITY@ANNOUNCE.MICROSOFT.COM Date: Thu, 26 Jul 2001 18:01:16 -0700 Subject: Microsoft Security Bulletin MS01-042 The following is a Security Bulletin from the Microsoft Product Security Notification Service. Please do not reply to this message, as it was sent from an unattended mailbox. ******************************** -----BEGIN PGP SIGNED MESSAGE----- - ---------------------------------------------------------------------- Title: Windows Media Player .NSC Processor Contains Unchecked Buffer Date: 26 July 2001 Software: Windows Media Player 6.4, 7, and 7.1 Impact: Run code of attacker's choice. Bulletin: MS01-042 Microsoft encourages customers to review the Security Bulletin at: http://www.microsoft.com/technet/security/bulletin/MS01-042.asp. - ---------------------------------------------------------------------- Issue: ====== Windows Media Player provides support for audio and video streaming. Streaming media channels can be configured by using Windows Media Station (.NSC) files. An unchecked buffer exists in the functionality used to process Windows Media Station files. This unchecked buffer could potentially allow an attacker to run code of his choice on the machine of another user. The attacker could either send a specially malformed file to another user and entice her to run or preview it, or he could host such a file on a web site and cause it to launch automatically whenever a user visited the site. The code could take any action on the machine that the legitimate user himself could take. Mitigating Factors: ==================== - Customers who have applied the Outlook E-mail Security Update (OESU) for Outlook 2000 or are running Outlook XP, which has the OESU functionality built-in, are automatically protected against HTML e-mail based attempts to exploit this vulnerability. - For others not in the above categories, the attacker would have to entice the potential victim to visit a web site he controlled, or to open an HTML e-mail he had sent. - The attacker would need to know the specific operating system that the user was running in order to tailor the attack code properly; if the attacker made an incorrect guess about the user's operating system platform, the attack would crash the user's Windows Media Player session, but not run code of the attacker's choice. Patch Availability: =================== - A patch is available to fix this vulnerability. Please read the Security Bulletin http://www.microsoft.com/technet/security/bulletin/ms01-042.asp for information on obtaining this patch. - --------------------------------------------------------------------- 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. -----BEGIN PGP SIGNATURE----- Version: PGP Personal Privacy 6.5.3 iQEVAwUBO2C9XI0ZSRQxA/UrAQGgBQf8CbzjtFGnQTiTt6yEngvhBX8pmq/C2VGE NMFl6VvHyqtMXEIkkV1RE1RQOVDSlniWIhI9Ep+wUqYi+BUeG9PDgzgjAjiKXmBV yv/RQalSgQjMuLz2d9JflTTyOudadDbyzrix0QbLwspvBbR1U6JM4Jeh0B7xn1p2 wp2jsuNlRX9byQJmjeMf64DyF51nqi2rdjG/ZoJ0m562JtzbLLQLU7w3o1xFKKsL hXd2YvfRUmNb+M0q9RZzThnpcJUXj9TTnlkq5GZC3uYi3SxmgqyD8bx2qsI6Bwq9 9gpZ5NQMvkcdGYMqy07eU8zI12f9KWvxJcxZbj0Oj5ahbTWtSDtY/w== =a1bP -----END PGP SIGNATURE----- ******************************************************************* 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. To verify the digital signature on this bulletin, please download our PGP key at http://www.microsoft.com/technet/security/notify.asp. For more information on the Microsoft Security Notification Service please visit http://www.microsoft.com/technet/security/notify.asp. For security-related information about Microsoft products, please visit the Microsoft Security Advisor web site at http://www.microsoft.com/security.