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             AUSCERT External Security Bulletin Redistribution

                              ESB-2009.1403.2
             Cumulative Security Update for Internet Explorer
                              3 November 2009

===========================================================================

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

Product:           Internet Explorer
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-2009-2531 CVE-2009-2530 CVE-2009-2529
                   CVE-2009-1547  

Original Bulletin: 
   http://www.microsoft.com/technet/security/bulletin/ms09-054.mspx

Comment: Microsoft have released an update to MS09-054 to correct a number
         of issues that occur after applying the original patch. Users who
         have installed the original patch will need to apply the latest 
         update available from:
         
           http://support.microsoft.com/kb/976749

Revision History:  November  3 2009: Added a comment on the required update to the 
                                     original patch
                   October  14 2009: Initial Release

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Microsoft Security Bulletin MS09-054 - Critical

Cumulative Security Update for Internet Explorer (974455)

Published: October 13, 2009

Version: 1.0

General Information

Executive Summary

  This security update resolves three privately reported vulnerabilities and 
  one publicly disclosed vulnerability in Internet Explorer. The 
  vulnerabilities could allow remote code execution if a user views a specially 
  crafted Web page using Internet Explorer. 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 releases of Internet 
  Explorer: Internet Explorer 5.01, Internet Explorer 6, Internet Explorer 6 
  Service Pack 1, Internet Explorer 7, and Internet Explorer 8. For more 
  information, see the subsection, Affected and Non-Affected Software, in this 
  section.

  The security update addresses these vulnerabilities by modifying the way that 
  Internet Explorer processes data stream headers, validates arguments, and 
  handles objects in memory. 

  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.

  See also the section, Detection and Deployment Tools and Guidance, later in 
  this bulletin.

  Known Issues. None

Affected Software

    Internet Explorer 5.01 Service Pack 4 when installed on Microsoft Windows 
    2000 Service Pack 4
    
    Internet Explorer 6 Service Pack 1 when installed on Microsoft Windows 
    2000 Service Pack 4

    Internet Explorer 6 for Windows XP Service Pack 2 and Windows XP Service 
    Pack 3

    Internet Explorer 6 for Windows XP Professional x64 Edition Service Pack 2

    Internet Explorer 6 for Windows Server 2003 Service Pack 2

    Internet Explorer 6 for Windows Server 2003 x64 Edition Service Pack 2

    Internet Explorer 6 for Windows Server 2003 with SP2 for Itanium-based 
    Systems

    Internet Explorer 7 for Windows XP Service Pack 2 and Windows XP Service 
    Pack 3

    Internet Explorer 7 for Windows XP Professional x64 Edition Service Pack 2

    Internet Explorer 7 for Windows Server 2003 Service Pack 2

    Internet Explorer 7 for Windows Server 2003 x64 Edition Service Pack 2

    Internet Explorer 7 for Windows Server 2003 with SP2 for Itanium-based 
    Systems

    Internet Explorer 7 in Windows Vista, Windows Vista Service Pack 1, and
    Windows Vista Service Pack 2

    Internet Explorer 7 in Windows Vista x64 Edition, Windows Vista x64 Edition 
    Service Pack 1, and Windows Vista x64 Edition Service Pack 2

    Internet Explorer 7 in 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)

    Internet Explorer 7 in 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)

    Internet Explorer 7 in Windows Server 2008 for Itanium-based Systems and 
    Windows Server 2008 for Itanium-based Systems Service Pack 2

    Internet Explorer 8 for Windows XP Service Pack 2 and Windows XP Service 
    Pack 3

    Internet Explorer 8 for Windows XP Professional x64 Edition Service Pack 2

    Internet Explorer 8 for Windows Server 2003 Service Pack 2

    Internet Explorer 8 for Windows Server 2003 x64 Edition Service Pack 2

    Internet Explorer 8 in Windows Vista, Windows Vista Service Pack 1, and
    Windows Vista Service Pack 2

    Internet Explorer 8 in Windows Vista x64 Edition, Windows Vista x64 Edition 
    Service Pack 1, and Windows Vista x64 Edition Service Pack 2

    Internet Explorer 8 in 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)

    Internet Explorer 8 in 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)

    Internet Explorer 8 in Windows 7 for 32-bit Systems

    Internet Explorer 8 in Windows 7 for x64-based Systems

    Internet Explorer 8 in Windows Server 2008 R2 for x64-based Systems 
   (Windows Server 2008 R2 Server Core installation not affected)

    Internet Explorer 8 in Windows Server 2008 R2 for Itanium-based Systems

Vulnerability Information
	
Data Stream Header Corruption Vulnerability - CVE-2009-1547

  A remote code execution vulnerability exists in the way that Internet 
  Explorer processes data stream headers in specific situations. An attacker 
  could exploit the vulnerability 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. If a user is logged on with 
  administrative user rights, an attacker who successfully exploited this 
  vulnerability could take complete control of an affected system. An attacker 
  could then install programs; view, change, or delete data; or create new 
  accounts with full user rights.
	
HTML Component Handling Vulnerability - CVE-2009-2529

  A remote code execution vulnerability exists in the way that Internet 
  Explorer handles argument validation of a variable in specific situations. An 
  attacker could exploit the vulnerability 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. If a 
  user is logged on with administrative user rights, an attacker who 
  successfully exploited this vulnerability could take complete control of an 
  affected system. An attacker could then install programs; view, change, or 
  delete data; or create new accounts with full user rights.
	
Uninitialized Memory Corruption Vulnerability - CVE-2009-2530

  A remote code execution vulnerability exists in the way Internet Explorer 
  accesses an object that has not been correctly initialized or has been 
  deleted. An attacker could exploit the vulnerability 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. If a user is logged on with administrative user rights, an 
  attacker who successfully exploited this vulnerability could take complete 
  control of an affected system. An attacker could then install programs; view, 
  change, or delete data; or create new accounts with full user rights.

Uninitialized Memory Corruption Vulnerability - CVE-2009-2531

  A remote code execution vulnerability exists in the way Internet Explorer 
  accesses an object that has not been correctly initialized or has been 
  deleted. An attacker could exploit the vulnerability 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. If 
  a user is logged on with administrative user rights, an attacker who 
  successfully exploited this vulnerability could take complete control of an 
  affected system. An attacker could then install programs; view, change, or 
  delete data; or create new accounts with full user rights.

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===========================================================================
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The University of Queensland
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Qld 4072

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