-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

                        National Cyber Alert System

    Technical Cyber Security Alert TA07-100A


Microsoft Updates for Multiple Vulnerabilities

   Original release date: April 10, 2007
   Last revised--
   Source: US-CERT


Systems Affected

     * Microsoft Windows
     * Microsoft Content Management Server
     * Microsoft Internet Explorer


Overview

   Microsoft has released updates that address critical vulnerabilities
   in Microsoft Windows and Microsoft Content Management Server.
   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 and Microsoft Content Management Server as part of
   the Microsoft Security Bulletin Summary for April 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.

   These updates include a fix to address a previously disclosed
   vulnerability in the Windows Client/Server Run-time Subsystem.

   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 or launch cross-site scripting attacks.


III. Solution

Apply updates from Microsoft

   Microsoft has provided updates for these vulnerabilities as part of
   the Microsoft Security Bulletin Summary for April 2007. 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 effects in your operating system 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 April 2007 updates - <http://www.kb.cert.org/vuls/byid?searchview&query=ms07-apr>

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

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

     * Windows Server Update Services - <http://www.microsoft.com/windowsserversystem/updateservices/default.mspx>
     
     * Securing Your Web Browser - <http://www.us-cert.gov/reading_room/securing_browser/>
    
____________________________________________________________________

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

     <http://www.us-cert.gov/cas/techalerts/TA07-100A.html>
____________________________________________________________________

   Feedback can be directed to US-CERT Technical Staff. Please send
   email to <cert@cert.org> with "TA07-100A Feedback VU#219848" in the
   subject.
____________________________________________________________________

   For instructions on subscribing to or unsubscribing from this
   mailing list, visit <http://www.us-cert.gov/cas/signup.html>.
___________________________________________________________________

   Produced 2007 by US-CERT, a government organization. 

   Terms of use:

   <http://www.us-cert.gov/legal.html>
____________________________________________________________________

   Revision History

   April 10, 2007: Initial release

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.1 (GNU/Linux)

iQEVAwUBRhvyw+xOF3G+ig+rAQKo9Af+OHf9/8orMmpmvOUeYjOPvJUVaczz/j2f
jXCVzfoU8B0lFWmqsdWwKGa8e6+ERQHT8G/g0BDloqGDD8eYpdhv4B7AXnKjeMZi
GCdETFcud/WU2tk2v8bF42Ku3Px5F+3pGzaXZlkQDo5p97y5sYl6FTfCDQZIw4xU
mZSh47dwMTb2PZvCnG4HD1+XATpzaPbR72QcRT6/KA+MIkHoSxfr9heLs4jUy91z
Gn+W7WEYEvxVTL8EledxZcJ9pVut2yTEhpB/VFYcdizAumcIYhb0U/tgGvMaJpm9
29YmTLfwpt2unLngiOByxQCtiJV9HbwzaJ0FC8CaNZzrmPmXJqVGzA==
=jtxD
-----END PGP SIGNATURE-----