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


   
                        National Cyber Alert System

                 Technical Cyber Security Alert TA06-010A


Microsoft Windows, Outlook, and Exchange Vulnerabilities

   Original release date: January 10, 2006
   Last revised: January 10, 2006
   Source: US-CERT


Systems Affected

     * Microsoft Windows
     * Microsoft Outlook
     * Microsoft Exchange

   For more complete information, refer to the Microsoft Security
   Bulletin Summary for January 2006.


Overview

   Microsoft has released updates that address critical vulnerabilities
   in Windows, Outlook, and Exchange. 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 Security Bulletins for January 2006 address vulnerabilities
   in Microsoft Windows, Outlook, and Exchange. Further information is
   available in the following US-CERT Vulnerability Notes:

   VU#915930 - Microsoft embedded web font buffer overflow 

   A heap-based buffer overflow in the way Microsoft Windows processes
   embedded web fonts may allow a remote, unauthenticated attacker to
   execute arbitrary code on a vulnerable system.
   (CVE-2006-0010)

   VU#252146 - Microsoft Outlook and Microsoft Exchange TNEF decoding
   vulnerability 

   Microsoft Outlook and Microsoft Exchange contain an unspecified
   vulnerability in processing TNEF attachments. This may allow a remote,
   unauthenticated attacker to execute arbitrary code on a system running
   the vulnerable software.
   (CVE-2006-0002)


II. Impact

   Exploitation of these vulnerabilities may allow a remote,
   unauthenticated attacker to execute arbitrary code with the privileges
   of the user. If the user is logged on with administrative privileges,
   the attacker could take complete control of an affected system. An
   attacker may also be able to cause a denial of service.


III. Solution

Apply Updates

   Microsoft has provided the updates for these vulnerabilities in the
   Security Bulletins and on the Microsoft Update site.

Workarounds

   Please see the US-CERT Vulnerability Notes in Appendix A for workarounds.


Appendix A. References

     * Microsoft Security Bulletin Summary for January 2006 -
       <http://www.microsoft.com/technet/security/bulletin/ms06-jan.mspx>

     * US-CERT Vulnerability Note VU#915930 -
       <http://www.kb.cert.org/vuls/id/915930>

     * US-CERT Vulnerability Note VU#252146 -
       <http://www.kb.cert.org/vuls/id/252146>

     * CVE-2006-0002 -
       <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0002>

     * CAN-2006-0010 -
       <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0010>

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

 ____________________________________________________________________

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

     <http://www.us-cert.gov/cas/techalerts/TA06-010A.html>
 ____________________________________________________________________

   Feedback can be directed to US-CERT Technical Staff. Please send
   email to <cert@cert.org> with "TA06-010A Feedback VU#915930" in the
   subject.
 ____________________________________________________________________

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

   Produced 2006 by US-CERT, a government organization.

   Terms of use:

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



Revision History

   January 10, 2006: Initial release


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

iQEVAwUBQ8Q6Bn0pj593lg50AQIL7Qf8CadB1mP4WdchYj+Ge/kKkSYCps/Q5y0S
6sgEiToVljKCUfdBEBbBomuXR5tFlHaIItefeFhzPIAJcVLkudXP3EcwvM8tvDN6
LpnGUquKucZUHFYUbuDdYcYvLRkXf5zTb3dS/zh03UfW2Gn/5s6zyBab30BGl7r/
LRSoF2bVPRY0E2RhYYK1RzY68/ZyPmES0s11RAx5F0QiejQNv/i32jTuoh2SyxIw
4L70DZm/vuAqDsSFCjYb2YUsScKIMJwmU4Hv39J/+dB0TARV7nhscSIHAXXBaccU
XBrGgSJCc+4YZq/8PnpWuDmEBMLcOuAcv8LXjBbcodAWRBwAPBXcBg==
=9cnz
-----END PGP SIGNATURE-----