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             AUSCERT External Security Bulletin Redistribution

                          ESB-2008.1038 -- [Win]
      MS08-068 Vulnerability in SMB Could Allow Remote Code Execution
                             12 November 2008

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

Product:              SMB
Publisher:            Microsoft
Operating System:     Windows
Impact:               Execute Arbitrary Code/Commands
Access:               Remote/Unauthenticated
CVE Names:            CVE-2008-4037

Original Bulletin:    
  http://www.microsoft.com/technet/security/bulletin/ms08-068.mspx

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Microsoft Security Bulletin MS08-068  Important

Vulnerability in SMB Could Allow Remote Code Execution (957097)

   Published: November 11, 2008

   Version: 1.0

General Information

Executive Summary

   This security update resolves a publicly disclosed vulnerability in 
   Microsoft Server Message Block (SMB) Protocol. The vulnerability could 
   allow remote code execution on affected systems. An attacker who 
   successfully exploited this vulnerability could install programs; view, 
   change, or delete data; or create new accounts with full user rights. 

   This security update is rated Important for all supported editions of 
   Microsoft Windows 2000, Windows XP, and Windows Server 2003, and Moderate 
   for all supported editions of Windows Vista and Windows Server 2008.

   The security update addresses the vulnerability by modifying the way that 
   SMB authentication replies are validated to prevent the replay of 
   credentials.

   Recommendation. Microsoft recommends that customers apply the update at 
   the earliest opportunity.


Affected Software

   o Microsoft Windows 2000 Service Pack 4 
   o Windows XP Service Pack 2
   o Windows XP Service Pack 3
   o Windows XP Professional x64 Edition and Windows XP Professional x64 
     Edition Service Pack 2
   o Windows Server 2003 Service Pack 1 and Windows Server 2003 Service 
     Pack 2
   o Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition 
     Service Pack 2
   o Windows Server 2003 with SP1 for Itanium-based Systems and Windows 
     Server 2003 with SP2 for Itanium-based Systems
   o Windows Vista and Windows Vista Service Pack 1
   o Windows Vista x64 Edition and Windows Vista x64 Edition Service Pack 1
   o Windows Server 2008 for 32-bit Systems*
   o Windows Server 2008 for x64-based Systems*
   o Windows Server 2008 for Itanium-based Systems

   *Windows Server 2008 Server Core installation not affected

Vulnerability Information

SMB Credential Reflection Vulnerability - CVE-2008-4037

A remote code execution vulnerability exists in the way that Microsoft 
Server Message Block (SMB) Protocol handles NTLM credentials when a user 
connects to an attacker's SMB server. This vulnerability allows an 
attacker to replay the user's credentials back to them and execute code in 
the context of 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.

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

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
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