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  3. Microsoft Windows Active Directory LDAP Request Validation Remote Denial Of Service Vulnerability

Microsoft Windows Active Directory LDAP Request Validation Remote Denial Of Service Vulnerability

Risk

Medium

Date Discovered

June 10, 2008

Description

Microsoft Windows is prone to a remote denial-of-service vulnerability because Microsoft Active Directory, ADAM (Active Directory Application Mode), and AD LDS (Active Directory Lightweight Directory Service) fail to handle specially crafted Lightweight Directory Access Protocol (LDAP) requests. An attacker can exploit this issue by sending a specially crafted LDAP request to the affected computer. This would cause the affected system to temporarily stop responding to LDAP requests, thus denying further service to legitimate users. Note that the attacker requires valid logon credentials to exploit this issue on Windows Server 2003 and on any system that has ADAM installed. This issue affects these components: - Active Directory on Microsoft Windows 2000, Windows Server 2003, and Windows Server 2008 - ADAM on Windows XP Professional and Windows Server 2003 - AD LDS on Windows Server 2008 Supported editions of Windows Server 2008 are not affected if installed using the Server Core installation option.

Technologies Affected

  • Avaya Messaging Application Server
  • Avaya Messaging Application Server MM 1.1
  • Avaya Messaging Application Server MM 2.0
  • Avaya Messaging Application Server MM 3.0
  • Avaya Messaging Application Server MM 3.1
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Advanced Server SP1
  • Microsoft Windows 2000 Advanced Server SP2
  • Microsoft Windows 2000 Advanced Server SP3
  • Microsoft Windows 2000 Datacenter Server
  • Microsoft Windows 2000 Datacenter Server SP1
  • Microsoft Windows 2000 Datacenter Server SP2
  • Microsoft Windows 2000 Datacenter Server SP3
  • Microsoft Windows 2000 Professional
  • Microsoft Windows 2000 Professional SP1
  • Microsoft Windows 2000 Professional SP2
  • Microsoft Windows 2000 Professional SP3
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Server SP1
  • Microsoft Windows 2000 Server SP2
  • Microsoft Windows 2000 Server SP3
  • Microsoft Windows Server 2003 Datacenter Edition
  • Microsoft Windows Server 2003 Datacenter Edition Itanium
  • Microsoft Windows Server 2003 Datacenter Edition Itanium SP1
  • Microsoft Windows Server 2003 Datacenter Edition Itanium SP1 Beta 1
  • Microsoft Windows Server 2003 Datacenter Edition SP1
  • Microsoft Windows Server 2003 Datacenter x64 Edition
  • Microsoft Windows Server 2003 Datacenter x64 Edition SP2
  • Microsoft Windows Server 2003 Enterprise Edition
  • Microsoft Windows Server 2003 Enterprise Edition Itanium
  • Microsoft Windows Server 2003 Enterprise Edition Itanium SP1
  • Microsoft Windows Server 2003 Enterprise Edition Itanium SP1 Beta 1
  • Microsoft Windows Server 2003 Enterprise Edition SP1
  • Microsoft Windows Server 2003 Enterprise x64 Edition
  • Microsoft Windows Server 2003 Enterprise x64 Edition SP2
  • Microsoft Windows Server 2003 Itanium
  • Microsoft Windows Server 2003 Itanium SP1
  • Microsoft Windows Server 2003 Itanium SP2
  • Microsoft Windows Server 2003 SP1
  • Microsoft Windows Server 2003 SP2
  • Microsoft Windows Server 2003 Standard Edition
  • Microsoft Windows Server 2003 Standard Edition SP1
  • Microsoft Windows Server 2003 Standard Edition SP2
  • Microsoft Windows Server 2003 Standard x64 Edition
  • Microsoft Windows Server 2003 Web Edition
  • Microsoft Windows Server 2003 Web Edition SP1
  • Microsoft Windows Server 2003 Web Edition SP2
  • Microsoft Windows Server 2003 x64 SP1
  • Microsoft Windows Server 2003 x64 SP2
  • Microsoft Windows Server 2008 Datacenter Edition
  • Microsoft Windows Server 2008 Enterprise Edition
  • Microsoft Windows Server 2008 Standard Edition
  • Microsoft Windows Server 2008 for 32-bit Systems
  • Microsoft Windows Server 2008 for x64-based Systems
  • Microsoft Windows XP Professional
  • Microsoft Windows XP Professional SP1
  • Microsoft Windows XP Professional SP2
  • Microsoft Windows XP Professional SP3
  • Microsoft Windows XP Professional x64 Edition
  • Microsoft Windows XP Professional x64 Edition SP2
  • Microsoft Windows XP Professional x64 Edition SP3
  • Nortel Networks Centrex IP Client Manager 10.0
  • Nortel Networks Centrex IP Client Manager 11.0
  • Nortel Networks Centrex IP Client Manager 9.0

Recommendations

Block external access at the network boundary, unless external parties require service.

Restrict access to the affected computer at the network perimeter. Grant access for trusted hosts and networks only.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.

Use NIDS to monitor networks for anomalous activity and report attempted attacks. Audit logs regularly.
The vendor has released fixes. Please see the references for more information.

Credits

Alex Matthews and John Guzik of Securify
Copyright © Symantec Corporation.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from secure@symantec.com.

Disclaimer
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.
Symantec, Symantec products, Symantec Security Response, and secure@symantec.com are registered trademarks of Symantec Corp. and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners.

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