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                  National Cyber Alert System

           Technical Cyber Security Alert TA07-009A


Microsoft Updates for Multiple Vulnerabilities

   Original release date: January 9, 2007
   Last revised: --
   Source: US-CERT


Systems Affected

     * Microsoft Windows
     * Microsoft Internet Explorer
     * Microsoft Outlook
     * Microsoft Excel for Windows and Mac OS X


Overview

   Microsoft has released updates that address critical vulnerabilities
   in Microsoft Windows, Internet Explorer, Outlook, and Excel.
   Exploitation of these vulnerabilities could allow a remote,
   unauthenticated attacker to execute arbitrary code or cause a denial
   of service on a vulnerable system.


I. Description

   Microsoft has released updates to address vulnerabilities that affect
   Microsoft Windows, Internet Explorer, Outlook, and Excel as part of
   the Microsoft Security Bulletin Summary for January 2007. The most
   severe vulnerabilities could allow a remote, unauthenticated attacker
   to execute arbitrary code or cause a denial of service on a vulnerable
   system.

   Note that both Windows and Mac OS X versions of Excel are affected by
   the vulnerabilities described in Microsoft Security Bulletin MS07-002.

   Further information about the vulnerabilities addressed by these
   updates is available in the Vulnerability Notes Database.


II. Impact

   A remote, unauthenticated attacker could execute arbitrary code on a
   vulnerable system. An attacker may also be able to cause a denial of
   service.


III. Solution

Apply updates from Microsoft

   Microsoft has provided updates for these vulnerabilities in the
   January 2007 Security Bulletins. The Security Bulletins describe any
   known issues related to the updates. Note any known issues described
   in the Bulletins and test for any potentially adverse affects in your
   environment.

   System administrators may wish to consider using an automated patch
   distribution system such as Windows Server Update Services (WSUS).


IV. References

     * US-CERT Vulnerability Notes for Microsoft January 2007 updates -
       <http://www.kb.cert.org/vuls/byid?searchview&query=ms07-jan>

     * Securing Your Web Browser -
       <http://www.us-cert.gov/reading_room/securing_browser/>

     * Microsoft Security Bulletin Summary for January 2007 -
       <http://www.microsoft.com/technet/security/bulletin/ms07-jan.mspx>

     * Microsoft Update - <https://update.microsoft.com/microsoftupdate/>

     * Microsoft Office Update - <http://officeupdate.microsoft.com/>

     * Windows Server Update Services -
       <http://www.microsoft.com/windowsserversystem/updateservices/default.mspx>

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   The most recent version of this document can be found at:

     <http://www.us-cert.gov/cas/techalerts/TA07-009A.html>
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   Feedback can be directed to US-CERT Technical Staff. Please send
   email to <cert@cert.org> with "TA07-009A Feedback VU#749964" in the
   subject.
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   Produced 2007 by US-CERT, a government organization.

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Revision History

   January 09, 2007: Initial release


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