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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

July 10, 2007

Description

Microsoft Windows is prone to a remote denial-of-service vulnerability because Microsoft Active Directory fails to handle specially crafted Lightweight Directory Access Protocol (LDAP) requests. An attacker can exploit this issue to cause the affected application to stop responding, denying further service to legitimate users.

Technologies Affected

  • Avaya CIE 1.0
  • Avaya CIE 1.0.2
  • Avaya Customer Interaction Express (CIE) Server 1.0
  • Avaya Customer Interaction Express (CIE) User Interface 1.0
  • Avaya Customer Interaction Express (CIE) User Interface 1.0.2
  • 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 Server
  • Microsoft Windows 2000 Server SP1
  • Microsoft Windows 2000 Server SP2
  • Microsoft Windows 2000 Server SP3
  • Microsoft Windows 2000 Server SP4

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 released patches to address this issue. Please see the references for more information. Microsoft security bulletin MS07-039 has been revised; please see the referenced bulletin for details.

Credits

Peter Winter-Smith of NGSSoftware is credited with the discovery of this vulnerability.
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.
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