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

                       AL-2008.0110 -- AUSCERT ALERT
                                   [Win]
 Microsoft Security Bulletin MS08-067  Critical - Vulnerability in Server
                 Service Could Allow Remote Code Execution
                              24 October 2008

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

Product:              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 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-2008-4250

Original Bulletin:    
  http://www.microsoft.com/technet/security/Bulletin/MS08-067.mspx

Comment: This is a critical out of cycle patch from Microsoft.
         Administrators are recommended to apply the patch immediately.
         
         "Microsoft is aware of limited, targeted attacks attempting to
         exploit the vulnerability."

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Microsoft Security Bulletin MS08-067  Critical

Vulnerability in Server Service Could Allow Remote Code Execution (958644)

   Published: October 23, 2008

   Version: 1.0

General Information

Executive Summary

   This security update resolves a privately reported vulnerability in the 
   Server service. The vulnerability could allow remote code execution if 
   an affected system received a specially crafted RPC request. On Microsoft 
   Windows 2000, Windows XP, and Windows Server 2003 systems, an attacker 
   could exploit this vulnerability without authentication to run arbitrary 
   code. It is possible that this vulnerability could be used in the 
   crafting of a wormable exploit. Firewall best practices and standard 
   default firewall configurations can help protect network resources from 
   attacks that originate outside the enterprise perimeter.

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

   The security update addresses the vulnerability by correcting the way 
   that the Server service handles RPC requests. 

   Recommendation. Microsoft recommends that customers apply the update 
   immediately.

Vulnerability Information

Server Service Vulnerability - CVE-2008-4250

   A remote code execution vulnerability exists in the Server service on 
   Windows systems. The vulnerability is due to the service not properly 
   handling specially crafted RPC requests. An attacker who successfully 
   exploited this vulnerability could take complete control of an affected 
   system.

Workarounds for Server Service Vulnerability - CVE-2008-4250

   Disable the Server and Computer Browser services
   On Windows Vista and Windows Server 2008, filter the affected RPC 
   identifier
   Block TCP ports 139 and 445 at the firewall
   To help protect from network-based attempts to exploit this 
   vulnerability, use a personal firewall, such as the Internet Connection 
   Firewall.

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        http://www.auscert.org.au/render.html?it=3192

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

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
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                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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