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             AUSCERT External Security Bulletin Redistribution

                               ESB-2009.1404
              Cumulative Security Update of ActiveX Kill Bits
                              14 October 2009

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Microsoft Windows
Publisher:         Microsoft
Operating System:  Windows 2000
                   Windows XP
                   Windows Server 2003
                   Windows Vista
                   Windows Server 2008
                   Windows 7
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2009-2493  

Reference:         ESB-2009.1176
                   ESB-2009.1101

Original Bulletin: 
   http://www.microsoft.com/technet/security/bulletin/ms09-055.mspx

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Microsoft Security Bulletin MS09-055 - Critical

Cumulative Security Update of ActiveX Kill Bits (973525)

Published: October 13, 2009

Version: 1.0

General Information

Executive Summary

  This security update addresses a privately reported vulnerability that is 
  common to multiple ActiveX controls and is currently being exploited. The 
  vulnerability that affects ActiveX controls that were compiled using the 
  vulnerable version of the Microsoft Active Template Library (ATL) could allow 
  remote code execution if a user views a specially crafted Web page with 
  Internet Explorer, instantiating the ActiveX control. Users whose accounts 
  are configured to have fewer user rights on the system could be less impacted
  than users who operate with administrative user rights.
  
  This security update is rated Critical for all supported editions of 
  Microsoft Windows 2000 and Windows XP, Important for all supported editions 
  of Windows Vista and Windows 7, Moderate for all supported editions of 
  Windows Server 2003, and Low for all supported editions of Windows Server 
  2008 and Windows Server 2008 R2. 

  The security update addresses the vulnerability by setting a kill bit so 
  that the vulnerable controls do not run in Internet Explorer. For more 
  information about the vulnerability, see the Frequently Asked Questions 
  (FAQ) subsection under the next section, Vulnerability Information.

  Recommendation. The majority of customers have automatic updating enabled and 
  will not need to take any action because this security update will be 
  downloaded and installed automatically. Customers who have not enabled 
  automatic updating need to check for updates and install this update manually. 
  For information about specific configuration options in automatic updating, 
  see Microsoft Knowledge Base Article 294871.

  For administrators and enterprise installations, or end users who want to 
  install this security update manually, Microsoft recommends that customers 
  apply the update immediately using update management software, or by checking 
  for updates using the Microsoft Update service.
  
  Known Issues. None

Affected Software

  Microsoft Windows 2000 Service Pack 4 
  
  Windows XP Service Pack 2 and Windows XP Service Pack 3

  Windows XP Professional x64 Edition Service Pack 2

  Windows Server 2003 Service Pack 2

  Windows Server 2003 x64 Edition Service Pack 2

  Windows Server 2003 with SP2 for Itanium-based Systems

  Windows Vista, Windows Vista Service Pack 1, and Windows Vista Service 
  Pack 2

  Windows Vista x64 Edition, Windows Vista x64 Edition Service Pack 1, and
  Windows Vista x64 Edition Service Pack 2

  Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit 
  Systems Service Pack 2 (Windows Server 2008 Server Core installation not 
  affected)

  Windows Server 2008 for x64-based Systems and Windows Server 2008 for 
  x64-based Systems Service Pack 2 (Windows Server 2008 Server Core 
  installation not affected)

  Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for 
  Itanium-based Systems Service Pack 2

  Windows 7 for 32-bit Systems

  Windows 7 for x64-based Systems

  Windows Server 2008 R2 for x64-based Systems (Windows Server 2008 R2 Server 
  Core installation not affected)

  Windows Server 2008 R2 for Itanium-based Systems

Vulnerability Information
	
ATL COM Initialization Vulnerability - CVE-2009-2493

  A remote code execution vulnerability exists in the Microsoft ActiveX 
  controls listed in the FAQ section of this vulnerability, which were compiled 
  using the vulnerable Microsoft Active Template Library described in Microsoft 
  Security Bulletin MS09-035. An attacker could exploit the vulnerability in 
  these controls by constructing a specially crafted Web page. When a user 
  views the Web page, the vulnerability could allow remote code execution. An 
  attacker who successfully exploited this vulnerability could gain the same 
  user rights as the logged on user.

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===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
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