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10 February 2010

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             AUSCERT External Security Bulletin Redistribution

         Vulnerability in Windows Client/Server Run-time Subsystem
                    Could Allow Elevation of Privilege
                             10 February 2010


        AusCERT Security Bulletin Summary

Product:           Microsoft Windows Client/Server Run-time Subsystem
Publisher:         Microsoft
Operating System:  Windows Server 2003
                   Windows 2000
                   Windows XP
Impact/Access:     Administrator Compromise -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2010-0023  

Original Bulletin: 

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

Microsoft Security Bulletin MS10-011 - Important

Vulnerability in Windows Client/Server Run-time Subsystem Could Allow 
Elevation of Privilege (978037)

Published: February 09, 2010

Version: 1.0

General Information

Executive Summary

  This security update resolves a privately reported vulnerability in 
  Microsoft Windows Client/Server Run-time Subsystem (CSRSS) in 
  Microsoft Windows 2000, Windows XP, and Windows Server 2003. Other 
  versions of Windows are not affected. The vulnerability could allow 
  elevation of privilege if an attacker logs on to the system and 
  starts a specially crafted application designed to continue running 
  after the attacker logs out. An attacker must have valid logon 
  credentials and be able to log on locally to exploit this 
  vulnerability. The vulnerability could not be exploited by anonymous 

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

  The security update addresses the vulnerability by correcting the 
  manner in which users' processes are terminated upon logout. 

  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 administrators and enterprise installations, or end users who want 
  to install this security update manually, Microsoft recommends that 
  customers apply the update at the earliest opportunity 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

CSRSS Local Privilege Elevation Vulnerability - CVE-2010-0023

  An elevation of privilege vulnerability exists because the Windows 
  Client/Server Run-time Subsystem (CSRSS) does not properly terminate 
  user processes when a user logs out. An attacker who successfully 
  exploited this vulnerability could run arbitrary code in kernel mode. 
  An attacker could then install programs; view, change, or delete data; 
  or create new accounts with full user rights.

- --------------------------END INCLUDED TEXT--------------------

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