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: PowerPoint File Parsing Vulnerability Date: January 22, 2001 Revised: January 25, 2001 (Version 2.0) Software: PowerPoint 2000 Impact: Execution of Arbitrary Code Bulletin: MS01-002 Microsoft encourages customers to review the Security Bulletin at: http://www.microsoft.com/technet/security/bulletin/ms01-002.asp - ---------------------------------------------------------------------- Revisions: ========== On January 22, Microsoft released the original version of this bulletin, to advise customers of the availability of a patch that eliminates a security vulnerability in Microsoft PowerPoint 2000. However, the originally released patch did not include the entirety of the fixes related to this vulnerability. An updated patch has been made available that corrects the orginally reported vulnerability. Customers who downloaded and installed the original patch should download and install the updated patch. Instructions for determining the current version of the patch and for installing the updated patch are available via the Patch Availability URL in the security bulletin referenced above. The bulletin has also been updated to more accurately reflect the conditions under which this vulnerability may be exploited. Issue: ====== A parsing routine that is executed when PowerPoint 2000 opens files contains an unchecked buffer. If an attacker inserted specially chosen data into a PowerPoint file and could entice another user into opening the file on his machine, the data would overrun the buffer, causing either of two effects. In the less serious case, overrunning the data would cause PowerPoint to fail, but wouldn't have any other effect. In the more serious case, overrunning the buffer could allow the attacker to cause code of her choice to run on the user's machine. The code could take any action that the user himself could take on the machine. Typically, this would enable the attacker's code to add, change or delete data, communicate with a remote server, or take other actions. Mitigating Factors: =================== - The user would need to be enticed into either opening the malformed PowerPoint 2000 file, visiting a malicious website, or viewing a specially crafted html email message. Patch Availability: =================== - A patch is available to fix this vulnerability. Please read Security Bulletin MS01-002 at: http://www.microsoft.com/technet/security/bulletin/ms01-002.asp for information on obtaining this patch. Acknowledgment: =============== - Dave Aitel and Frank Swiderski of @Stake (http://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. 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