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             AUSCERT External Security Bulletin Redistribution

                               ESB-2010.1133
         Vulnerability in Task Scheduler Could Allow Elevation of
                            Privilege (2305420)
                             15 December 2010

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

Product:           Task Scheduler
Publisher:         Microsoft
Operating System:  Windows 7
                   Windows Vista
                   Windows Server 2008
Impact/Access:     Administrator Compromise -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2010-3338  

Original Bulletin: 
   http://www.microsoft.com/technet/security/Bulletin/MS10-092.mspx

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Microsoft Security Bulletin MS10-092 - Important

Vulnerability in Task Scheduler Could Allow Elevation of Privilege (2305420)

Version: 1.0

General Information

Executive Summary

  This security update resolves a publicly disclosed vulnerability in Windows 
  Task Scheduler. The vulnerability could allow elevation of privilege if an 
  attacker logged on to an affected system and ran a specially crafted 
  application. An attacker must have valid logon credentials and be able to
  log on locally to exploit this vulnerability. The vulnerability could not
  be exploited remotely or by anonymous users.

  This security update is rated Important for all supported editions of 
  Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2.
  For more information, see the subsection, Affected and Non-Affected
  Software, in this section.

  The security update addresses the vulnerability by correcting the way Task 
  Scheduler conducts integrity checks to validate that tasks run with the 
  intended user privileges. For more information about the vulnerability, see 
  the Frequently Asked Questions (FAQ) subsection for the specific 
  vulnerability entry under the next section, Vulnerability Information.

Affected Software

  Windows Vista Service Pack 1
  Windows Vista Service Pack 2
  Windows Vista x64 Edition Service Pack 1
  Windows Vista x64 Edition Service Pack 2
  Windows Server 2008 for 32-bit Systems
  Windows Server 2008 for 32-bit Systems Service Pack 2*
  Windows Server 2008 for x64-based Systems
  Windows Server 2008 for x64-based Systems Service Pack 2*
  Windows Server 2008 for Itanium-based Systems
  Windows Server 2008 for Itanium-based Systems Service Pack 2
  Windows 7 for 32-bit Systems
  Windows 7 for x64-based Systems
  Windows Server 2008 R2 for x64-based Systems*
  Windows Server 2008 R2 for Itanium-based Systems

Vulnerability Information

Task Scheduler Vulnerability - CVE-2010-3338

  An elevation of privilege vulnerability exists in the way that the Windows
  Task Scheduler improperly validates whether scheduled tasks run within the 
  intended security context. An attacker who successfully exploited this 
  vulnerability could run arbitrary code in the security context of the local 
  system. An attacker could then install programs; view, change, or delete
  data; or create new accounts with full user rights.

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===========================================================================
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The University of Queensland
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