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             AUSCERT External Security Bulletin Redistribution

                          ESB-2008.0147 -- [Win]
         MS08-003 - Important - Vulnerability in Active Directory
                       Could Allow Denial of Service
                             13 February 2008

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

Product:              Active Directory
                      ADAM
Publisher:            Microsoft
Operating System:     Windows 2000
                      Windows XP
                      Windows Server 2003
Impact:               Denial of Service
Access:               Remote/Unauthenticated
CVE Names:            CVE-2008-0088

Original Bulletin:  
  http://www.microsoft.com/technet/security/bulletin/ms08-003.mspx

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MS08-003 - Important - Vulnerability in Active Directory Could Allow Denial
of Service (946538)

   Published: February 12, 2008
   Version: 1.0

   This important security update resolves a privately reported
   vulnerability in implementations of Active Directory on Microsoft
   Windows 2000 Server and Windows Server 2003 and Active Directory
   Application Mode (ADAM) when installed on Windows XP and Windows Server
   2003. The vulnerability could allow a denial of service condition. On
   Windows Server 2003 and Windows XP an attacker must have valid logon
   credentials to exploit this vulnerability. An attacker who successfully
   exploited this vulnerability could cause the system to stop responding
   or automatically restart.


Affected Software

   o Microsoft Windows 2000 Server Service Pack 4 - Active Directory

   o Windows XP Professional Service Pack 2 - ADAM

   o Windows XP Professional x64 Edition and Windows XP Professional
     Edition Service Pack 2 - ADAM

   o Windows Server 2003 Service Pack 1 and Windows Server 2003 Service
     Pack 2 - Active Directory

   o Windows Server 2003 Service Pack 1 and Windows Server 2003 Service
     Pack 2 - ADAM

   o Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition
     Service Pack 2 - Active Directory

   o Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition
     Service Pack 2 - ADAM

   o Windows Server 2003 with SP1 for Itanium-based Systems and Windows
     Server 2003 with SP2 for Itanium-based Systems - Active Directory


Vulnerability Information

Active Directory Vulnerability - CVE-2008-0088

   A denial of service vulnerability exists in implementations of Active
   Directory on Microsoft Windows 2000 and Windows Server 2003. The
   vulnerability also exists in implementations of Active Directory
   Application Mode (ADAM) when installed on Windows XP and Windows Server
   2003. The vulnerability is due to improper validation of specially
   crafted LDAP requests. An attacker who successfully exploited this
   vulnerability could cause the computer to stop responding and
   automatically restart.

Workarounds for Active Directory Vulnerability - CVE-2008-0088

   o Block TCP ports 389 and 3268 at the perimeter firewall

   o To help protect from network-based attempts to exploit this
     vulnerability, block the affected ports by using IPSec on the affected
     systems.



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

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