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             AUSCERT External Security Bulletin Redistribution

 Vulnerability in Windows Shell Handler Could Allow Remote Code Execution
                             10 February 2010


        AusCERT Security Bulletin Summary

Product:           Microsoft Windows Shell Handler
Publisher:         Microsoft
Operating System:  Windows 2000
                   Windows Server 2003
                   Windows XP
Impact/Access:     Administrator Compromise -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2010-0027  

Reference:         ESB-2010.0072

Original Bulletin: 

- --------------------------BEGIN INCLUDED TEXT--------------------

Microsoft Security Bulletin MS10-007 - Critical

Vulnerability in Windows Shell Handler Could Allow Remote Code Execution 

Published: February 09, 2010

Version: 1.0

General Information

Executive Summary

  This security update resolves a privately reported vulnerability in 
  Microsoft Windows 2000, Windows XP, and Windows Server 2003. Other 
  versions of Windows are not impacted by this security update. The 
  vulnerability could allow remote code execution if an application, 
  such as a Web browser, passes specially crafted data to the 
  ShellExecute API function through the Windows Shell Handler.

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

  The security update addresses the vulnerability by correcting the way 
  that the ShellExecute API validates input parameters. 

  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.

  Known Issues. None

Affected Software 

Microsoft Windows 2000 Service Pack 4
Windows XP Service Pack 2 and Windows XP Service Pack 3
Windows XP Professional x64 Edition Service Pack 2
Windows Server 2003 Service Pack 2
Windows Server 2003 x64 Edition Service Pack 2
Windows Server 2003 with SP2 for Itanium-based Systems

Vulnerability Information
URL Validation Vulnerability - CVE-2010-0027

  A remote code execution vulnerability exists in affected versions of 
  Microsoft Windows. The vulnerability results from the incorrect 
  validation of input sent to the ShellExecute API function. An attacker 
  who successfully exploited this vulnerability could take complete control 
  of an affected system.

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