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


                    National Cyber Alert System

              Technical Cyber Security Alert TA09-209A


Microsoft Windows, Internet Explorer, and Active Template Library (ATL) Vulnerabilities

   Original release date: July 28, 2009
   Last revised: --
   Source: US-CERT


Systems Affected

     * Microsoft Windows and Windows Server
     * Microsoft Internet Explorer
     * Microsoft Visual Studio and C++ Redistributable Package
     * ActiveX controls from multiple vendors


Overview

   Microsoft has released out-of-band updates to address critical
   vulnerabilities in Microsoft Internet Explorer running on most
   supported versions of Windows. The updates also help mitigate
   attacks against ActiveX controls developed with vulnerable versions
   of the Microsoft Active Template Library (ATL).


I. Description

   Microsoft has released updates for critical vulnerabilities in
   Internet Explorer. The updates also include mitigations for attacks
   against vulnerable ActiveX controls that were created using
   vulnerable versions of the Active Template Library (ATL).
   
   Vulnerabilities present in the ATL can cause vulnerabilities in the
   resulting ActiveX controls and COM components. For example, the ATL
   typographical error described in this Security Development
   Lifecycle blog post caused the Microsoft Video ActiveX control
   stack buffer overflow (VU#180513, CVE-2008-0015).
   
   Any ActiveX control or COM component that was created with a
   vulnerable version of the ATL may be vulnerable. For example, Adobe
   and Cisco are affected.


II. Impact

   By convincing a user to view a specially crafted HTML document
   (e.g., a Web page, HTML email message, or HTML attachment), an
   attacker may be able to execute arbitrary code.


III. Solution

   System Administrators
   
   To address the vulnerabilities in Internet Explorer and mitigate
   attacks against vulnerable ATL-based ActiveX controls, apply the
   updates described in Microsoft Security Bulletin MS09-034. Further
   details about the ATL mitigations are available in a Microsoft
   Security Research & Defense blog post.
   
   Administrators should consider using an automated update
   distribution system such as Windows Server Update Services (WSUS).
   
   Developers
   
   To stop creating vulnerable controls, update the ATL as described
   in Microsoft Security Bulletin MS09-035. To address vulnerabilities
   in existing controls, recompile the controls using the updated ATL.
   Further discussion about the ATL vulnerabilities can be found in
   the Security Development Lifecycle blog.


IV. References

 * Vulnerability Note VU#456745 -
   <http://www.kb.cert.org/vuls/id/456745>

 * Vulnerability Note VU#180513 -
   <http://www.kb.cert.org/vuls/id/180513>

 * Vulnerabilities in Microsoft Active Template Library (ATL) Could
   Allow Remote Code Execution -
   <http://www.microsoft.com/technet/security/advisory/973882.mspx>

 * Microsoft Security Bulletin MS09-34 -
   <http://www.microsoft.com/technet/security/bulletin/ms09-034.mspx>

 * Microsoft Security Bulletin MS09-35 -
   <http://www.microsoft.com/technet/security/bulletin/ms09-035.mspx>

 * Protect Your Computer: Active Template Library, Security Updates -
   <http://www.microsoft.com/security/atl.aspx>

 * Microsoft Security Advisory 973882, Microsoft Security Bulletins
   MS09-034 and MS09-035 Released -
   <http://blogs.technet.com/msrc/archive/2009/07/28/microsoft-security-advisory-973882-microsoft-security-bulletins-ms09-034-and-ms09-035-released.aspx>

 * Black Hat USA Spotlight: ATL Killbit Bypass -
   <http://blogs.technet.com/bluehat/archive/2009/07/27/black-hat-usa-atl-killbit-bypass.aspx>

 * ATL -
   <http://msdn.microsoft.com/en-us/library/3ax346b7(VS.71).aspx>

 * ATL, MS09-035 and the SDL -
   <http://blogs.msdn.com/sdl/archive/2009/07/28/atl-ms09-035-and-the-sdl.aspx>

 * Internet Explorer Mitigations for ATL Data Stream Vulnerabilities -
   <http://blogs.technet.com/srd/archive/2009/07/28/internet-explorer-mitigations-for-atl-data-stream-vulnerabilities.aspx>

 * Microsoft Windows Server Update Services -
   <http://technet.microsoft.com/en-us/wsus/default.aspx>

 * Impact of Microsoft ATL vulnerability on Adobe Products -
   <http://blogs.adobe.com/psirt/2009/07/impact_of_microsoft_atl_vulner.html>

 * Cisco Security Advisory: Active Template Library (ATL)
   Vulnerability -
   <http://www.cisco.com/warp/public/707/cisco-sa-20090728-activex.shtml>

 * CVE-2008-0015 -
   <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0015>

 ____________________________________________________________________

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

     <http://www.us-cert.gov/cas/techalerts/TA09-209A.html>
 ____________________________________________________________________

   Feedback can be directed to US-CERT Technical Staff. Please send
   email to <cert@cert.org> with "TA09-209A Feedback VU#456745" in
   the subject.
 ____________________________________________________________________

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

   Produced 2009 by US-CERT, a government organization.

   Terms of use:

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

Revision History
  
  July 28, 2009: Initial release


-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.5 (GNU/Linux)

iQEVAwUBSm9zYHIHljM+H4irAQK3fQf/exOIYdDpE9QN9m3mOjZN23BJrZ1TsdEt
tXKZRgudnomA/R6rGCXeVZZu0aRqB8tjQyeLgQU+2bqjXPYioa9BWM1EcPAWILa8
h3UWb6HWOzqSnEbHPAQ8+YgJUqcoKbA1FD4rYIj0rI2tJcfRx4JsHtLwaozMP/dJ
xvBXCIKGF86iL5k638Ki9Q1cXaHjCSIpzPcq5RaOw9n5PQk+UzSjiTxDM0Kvu2HB
rWLgn95VpFz0ZulR0+7+qkg4e44o0MKOUhJ4pa23sNgM5ZIE9wGhYZYIeHoqDVm8
g3u4sCCBPupjQw+bfeGBz8kHQaue1is1sgsKrm2DITeUizKSSCmcMA==
=U5EB
-----END PGP SIGNATURE-----