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Microsoft Security Bulletin MS01-038
From: Microsoft Product Security <secnotif () MICROSOFT COM>
Date: Thu, 12 Jul 2001 19:38:59 -0700
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 View Control Exposes Unsafe Functionality Date: 12 July 2001 Software: Outlook 98, 2000, and 2002 Impact: Run code of attacker's choice via either web page or HTML e-mail. Bulletin: MS01-038 Microsoft encourages customers to review the Security Bulletin at: http://www.microsoft.com/technet/security/bulletin/MS01-038.asp. - ---------------------------------------------------------------------- Issue: ====== The Microsoft Outlook View Control is an ActiveX control that allows Outlook mail folders to be viewed via web pages. The control should only allow passive operations such as viewing mail or calendar data. In reality, though, it exposes a function that could allow the web page to manipulate Outlook data. This could enable an attacker to delete mail, change calendar information, or take virtually any other action through Outlook including running arbitrary code on the user's machine. Hostile web sites would pose the greatest threat with respect to this vulnerability. If a user could be enticed into visiting a web page controlled by an attacker, script or HTML on the page could invoke the control when the page was opened. The script or HTML could then use the control to take whatever action the attacker desired on the user's Outlook data. It also would be possible for the attacker to send an HTML e-mail to a user, with the intent of invoking the control when the recipient opened the mail. However, the Outlook E-mail Security Update, that automatically installs as part of Outlook 2002 would thwart such an attack. The Update causes HTML e-mails to be opened in the Restricted Sites Zone, where ActiveX controls are disabled by default. Microsoft is preparing a patch that will eliminate the vulnerability. However, while this patch is under development, we recommend that customers disable ActiveX controls in the Internet Zone to protect against the web-based scenario discussed above. (The FAQ provides information on how administrators can use Group Policy to make this configuration change network-wide). To protect against the mail-borne scenario, we strongly recommend that Outlook 98 and 2000 users install the Outlook E-mail Security Update if they haven't already done so. When the patch is complete, Microsoft will re-release this bulletin and provide details on where to obtain the patch and how to use it. Mitigating Factors: ==================== - The previously-released Outlook E-mail Security Update that is integrated into Outlook 2002 would prevent this vulnerability from being exploited via e-mail in all affected Outlook versions. - The vulnerability provides no capability for the attacker to force a user to visit a web page that exploits it. Patch Availability: =================== - A patch is available to fix this vulnerability. Please read the Security Bulletin http://www.microsoft.com/technet/security/bulletin/ms01-038.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 iQEVAwUBO05fMI0ZSRQxA/UrAQF0mwf8CE7Dm+m3/9gddmmIaBVGeMokvuJRwJa5 qlJv45jy/0jbjqq6GyFwVHS//S4rUg9aXFn/XooCc9piGbJhmY+o3uWr9XxdeZ/A 0+Do6QauobjjOdaMzJuGJ31aqIDqiVZdL4h/JQU6j0+n7MUVQM4hqlsCJDXXWv4u 2kNkd8Vi0zb1GxIZwJLHStmNi5NicgePQcuk7UirmLdYi8eSyOTfpcIp5WT7u7L9 h+4boyabo7cqTO5JSAtvoiqJnF/ItdYxeBKSfq2fCZQDgPYsSQIkvdLwGyqV4qG7 mh9y/N6qFZo7GhAFuQRgyn+ALgll6+5T1ojkiWVaWfO460a5TSM41w== =tRTd -----END PGP SIGNATURE----- ******************************************************************* You have received this e-mail bulletin as a result of your registration to the Microsoft Product Security Notification Service. 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Current thread:
- Microsoft Security Bulletin MS01-038 Microsoft Product Security (Jul 13)
- Re: Microsoft Security Bulletin MS01-038 Silviu Cojocaru (Jul 15)