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

                       AL-2008.0120 -- AUSCERT ALERT
                                   [Win]
         MS08-071 - Critical - Vulnerabilities in GDI Could Allow
                           Remote Code Execution
                             10 December 2008

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

Product:              Microsoft Windows 2000 Service Pack 4
                      Windows XP Service Pack 2
                      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 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-2008-2249 CVE-2008-3465

Original Bulletin:    
  http://www.microsoft.com/technet/security/Bulletin/ms08-071.mspx

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Microsoft Security Bulletin MS08-071 - Critical

Vulnerabilities in GDI Could Allow Remote Code Execution (956802)

   Published: December 9, 2008

   Version: 1.0

General Information

Executive Summary

   This security update resolves two privately reported vulnerabilities in 
   GDI. Exploitation of either of these vulnerabilities could allow remote 
   code execution if a user opens a specially crafted WMF image file. An 
   attacker who successfully exploited these vulnerabilities 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. 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, Windows XP, Windows Server 2003, Windows Vista, 
   and Windows Server 2008. For more information, see the subsection, Affected 
   and Non-Affected Software, in this section.

   The security update addresses the vulnerabilities by modifying the way GDI 
   validates file size parameters and performs integer calculations to prevent 
   overflow conditions. For more information about the vulnerabilities, see 
   the Frequently Asked Questions (FAQ) subsection for the specific 
   vulnerability entry under the next section, Vulnerability Information.

   Recommendation. Microsoft recommends that customers apply the update 
   immediately.

   Known Issues. None

Affected Software

   Microsoft Windows 2000 Service Pack 4

   Windows XP Service Pack 2
   
   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 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 affected. For supported 
   editions of Windows Server 2008, this update applies, with the same 
   severity rating, whether or not Windows Server 2008 was installed using 
   the Server Core installation option.

Vulnerability Information

GDI Integer Overflow Vulnerability - CVE-2008-2249

   A remote code execution vulnerability exists in the way that GDI handles 
   integer calculations. The vulnerability could allow remote code execution 
   if a user opens a specially crafted WMF image file. 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.

GDI Heap Overflow Vulnerability - CVE-2008-3465

   A remote code execution vulnerability exists in the way that GDI handles 
   file size parameters in WMF files. The vulnerability could allow remote 
   code execution if a third-party application uses a specific Microsoft API 
   to copy a specially crafted WMF image file. 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.

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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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