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             AUSCERT External Security Bulletin Redistribution

       Vulnerability in Windows Netlogon Service Could Allow Denial
                           of Service (2207559)
                             15 December 2010


        AusCERT Security Bulletin Summary

Product:           Windows Netlogon Service
Publisher:         Microsoft
Operating System:  Windows Server 2003
                   Windows Server 2008
Impact/Access:     Denial of Service -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2010-2742  

Original Bulletin: 

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

Microsoft Security Bulletin MS10-101 - Important

Vulnerability in Windows Netlogon Service Could Allow Denial of Service 

Published: December 14, 2010

Version: 1.0

General Information

Executive Summary

  This security update resolves a privately reported vulnerability in the 
  Netlogon RPC Service on affected versions of Windows Server that are 
  configured to serve as domain controllers. The vulnerability could allow 
  denial of service if an attacker sends a specially crafted RPC packet to the 
  Netlogon RPC Service interface on an affected system. An attacker requires 
  administrator privileges on a machine that is joined to the same domain as
  the affected domain controller in order to exploit this vulnerability.

  This security update is rated Important for all supported editions of Windows
  Server 2003, Windows Server 2008 (except Itanium-based editions), and Windows
  Server 2008 R2 (except Itanium-based editions). For more information, see the
  subsection, Affected and Non-Affected Software, in this section.

  The security update addresses the vulnerability by correcting the validation 
  of user-provided data in the Netlogon RPC Service interface. 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 Server 2003 Service Pack 2
  Windows Server 2003 x64 Edition Service Pack 2
  Windows Server 2003 with SP2 for Itanium-based Systems
  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 R2 for x64-based Systems*

   *Server Core installation affected. 

Vulnerability Information

Netlogon RPC Null dereference DOS Vulnerability - CVE-2010-2742

  A remote authenticated denial of service vulnerability exists in 
  implementations of the Netlogon RPC Service on affected versions of
  Windows Server. An attacker who successfully exploited this vulnerability
  could cause affected versions of the Windows Server to restart.

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