From secnotif@MICROSOFT.COM Fri Feb 23 14:25:18 2001 From: Microsoft Product Security To: BUGTRAQ@SECURITYFOCUS.COM Date: Thu, 22 Feb 2001 19:36:02 -0800 Subject: [BUGTRAQ] Microsoft Security Bulletin MS01-012 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: Outlook, Outlook Express Vcard Handler Contains Unchecked Buffer Date: 22 February 2001 Software: Outlook, Outlook Express Impact: Run code of attacker's choice Bulletin: MS01-012 Microsoft encourages customers to review the Security Bulletin at: http://www.microsoft.com/technet/security/bulletin/MS01-012.asp. - ---------------------------------------------------------------------- Issue: ====== Outlook Express provides several components that are used both by it and Outlook, if Outlook is installed on the machine. One such component, used to process vCards, contains an unchecked buffer. By creating a vCard and editing it to contain specially chosen data, then sending it to another user, an attacker could cause either of two effects to occur if the recipient opened it. In the less serious case, the attacker could cause the mail client to fail. If this happened, the recipient could resume normal operation by restarting the mail client and deleting the offending mail. In the more serious case, the attacker could cause the mail client to run code of her choice on the user's machine. Such code could take any desired action, limited only by the permissions of the recipient on the machine. Because the component that contains the flaw ships as part of OE, which itself ships as part of IE, the patch is specified in terms of the version of IE rather than OE or Outlook. Mitigating Factors: ==================== - There is no means by which a Vcard could be made to open automatically. Patch Availability: =================== - A patch is available to fix this vulnerability. Please read the Security Bulletin http://www.microsoft.com/technet/security/bulletin/ms01-012.asp for information on obtaining this patch. Acknowledgment: =============== - Ollie Whitehouse of @Stake (www.atstake.com) - --------------------------------------------------------------------- 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 iQEVAwUBOpXajo0ZSRQxA/UrAQHE/wf/UAy7GXCnezaGbWOjxjpgK5vuhCs/e37J 3hfsPFLqtxMqA/1L0OtnkhSlGIjIciwkCD0A7Uq6wFp+deA/Squ+zCrucZHGwBGr Czw/7+W7lZ7FzZBF2jbs6ZNjyM3jyYE8TalsMlOFO3SXwXdX1j/PEeJ3jC5dnYuj d1mjvCMGjdhFSFm0zcOVPhOPci4AXjGNSah5tJIu2u5gzCnfCh7DEurMajr5cjnY qLq6tMEwgninJJNIxSjl6p5v9Va0rlZ+du6SDfYoSgC2cXgxWe7uo9qFrkzxK9ER BzVhwe37jOp21P6qkCB5Rbymvrbr3748SHcoBMTXHZ1M0WZFe92oXg== =2/Vm -----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.