Microsoft KB Archive/831183

= Your domain controller is unresponsive, and CPU utilization reaches 100 percent =

Article ID: 831183

Article Last Modified on 2/21/2007

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APPLIES TO


 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows 2000 Server
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)

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SYMPTOMS
Your domain controller may stop responding. In this scenario, your computer's CPU utilization and memory usage may be as high as 100 percent.

If you do not take any corrective action, the server does eventually return to standard operation.



CAUSE
This issue may occur if a malicious user launches a denial of service attack by sending a specially crafted Lightweight Directory Access Protocol (LDAP) message to the Active Directory directory service.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section of this article.Microsoft is researching this problem and will post more information in this article when the information becomes available.



Acknowledgment: Aelita Software contributed to this Microsoft Knowledge Base article.

Keywords: kbhotfixserver kbqfe kbpending kbbug KB831183

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