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A  U  S  C  E  R  T                                           A  L  E  R  T

                       AL-2008.0122 -- AUSCERT ALERT
                                   [Win]
  MS08-073 - Critical - Cumulative Security Update for Internet Explorer
                             10 December 2008

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        AusCERT Alert Summary
        ---------------------

Product:              Internet Explorer 5.01
                      Microsoft Internet Explorer 6
                      Microsoft Internet Explorer 6 Service Pack 1
                      Windows Internet Explorer 7
                      Microsoft Internet Explorer 5.01 Service Pack 4
                      Microsoft Windows 2000 Service Pack 4
                      Windows XP Service Pack 2 and Windows XP Service 
                        Pack 3
                      Windows XP Professional x64 Edition and Windows 
                        XP Professional x64 Edition Service Pack 2
                      Windows Server 2003 Service Pack 1 and Windows 
                        Server 2003 Service Pack 2
                      Windows Server 2003 x64 Edition and Windows Server 
                        2003 x64 Edition Service Pack 2
                      Windows Server 2003 with SP1 for Itanium-based Systems 
                        and Windows Server 2003 with SP2 for Itanium-based 
                        Systems
                      Windows XP Professional x64 Edition and Windows XP 
                        Professional x64 Edition Service Pack 2
                      Windows Server 2003 Service Pack 1 and Windows 
                        Server 2003 Service Pack 2
                      Windows Server 2003 x64 Edition and Windows Server 
                        2003 x64 Edition Service Pack 2
                      Windows Vista and Windows Vista Service Pack 1
                      Windows Vista x64 Edition and Windows Vista x64 
                        Edition Service Pack 1
                      Windows Server 2008 for 32-bit Systems*
                      Windows Server 2008 for x64-based Systems*
                      Windows Server 2008 for Itanium-based Systems
Publisher:            Microsoft
Operating System:     Windows
Impact:               Execute Arbitrary Code/Commands
Access:               Remote/Unauthenticated
CVE Names:            CVE-2008-4258 CVE-2008-4259 CVE-2008-4260
                      CVE-2008-4261

Original Bulletin:    
  http://www.microsoft.com/technet/security/bulletin/ms08-073.mspx

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Microsoft Security Bulletin MS08-073 - Critical

Cumulative Security Update for Internet Explorer (958215)

   Published: December 9, 2008

   Version: 1.0

General Information

Executive Summary

   This security update resolves four privately reported vulnerabilities. 
   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 Internet Explorer 5.01 and 
   Internet Explorer 6 Service Pack 1, running on Microsoft Windows 2000; 
   Internet Explorer 6 running on Windows XP; and Internet Explorer 7. For 
   Internet Explorer 6 running on Windows Server 2003, this security update 
   is rated Moderate. 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 validates parameters, handles the error resulting 
   in the exploitable condition, and handles extra data when embedding 
   objects in Web pages. For more information about the vulnerabilities, see 
   the Frequently Asked Questions (FAQ) subsection under the next section, 
   Vulnerability Information.

   Recommendation. Microsoft recommends that customers apply the update 
   immediately.

   Known Issues. None

Affected Software

   Internet Explorer 5.01
 	 	 
   Microsoft Internet Explorer 6

   Microsoft Internet Explorer 6 Service Pack 1

   Windows Internet Explorer 7

   Microsoft Internet Explorer 5.01 Service Pack 4

   Microsoft Windows 2000 Service Pack 4

   Windows XP Service Pack 2 and Windows XP Service Pack 3

   Windows XP Professional x64 Edition and Windows XP Professional x64 
   Edition Service Pack 2

   Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2
	
   Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition 
   Service Pack 2

   Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 
   2003 with SP2 for Itanium-based Systems
	
   Windows XP Professional x64 Edition and Windows XP Professional x64 
   Edition Service Pack 2
	
   Windows Server 2003 Service Pack 1 and Windows Server 2003 Service 
   Pack 2

   Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition 
   Service Pack 2
	
   Windows Vista and Windows Vista Service Pack 1
	
   Windows Vista x64 Edition and Windows Vista x64 Edition Service Pack 1

   Windows Server 2008 for 32-bit Systems*
   
   Windows Server 2008 for x64-based Systems*
	
   Windows Server 2008 for Itanium-based Systems

   * Windows Server 2008 server core installation not affected. The 
   vulnerabilities addressed by this update do not affect supported editions 
   of Windows Server 2008 if Windows Server 2008 was installed using the 
   Server Core installation option.

Vulnerability Information

Parameter Validation Memory Corruption Vulnerability - CVE-2008-4258

   A remote code execution vulnerability exists in the way Internet 
   Explorer handles certain navigation methods. 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.

HTML Objects Memory Corruption Vulnerability - CVE-2008-4259

   A remote code execution vulnerability exists in Internet Explorer due to 
   attempts to access uninitialized memory in certain 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.
	
Uninitialized Memory Corruption Vulnerability  CVE-2008-4260

   A remote code execution vulnerability exists in the way Internet Explorer 
   accesses an object that 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.

HTML Rendering Memory Corruption Vulnerability - CVE-2008-4261

   A remote code execution vulnerability exists in the way Internet Explorer 
   embeds objects into a Web page. 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.

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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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