1. /
  2. Security Response/
  3. Microsoft Windows WINS Server WPAD and ISATAP Access Validation Vulnerability

Microsoft Windows WINS Server WPAD and ISATAP Access Validation Vulnerability

Risk

Medium

Date Discovered

March 10, 2009

Description

The Microsoft Windows WINS Server is prone to an access-validation vulnerability because the software fails to properly restrict access when defining WPAD (Web Proxy Autodiscovery Protocol) and ISATAP (Intra-Site Automatic Tunnel Addressing Protocol) entries. An authenticated attacker may exploit this issue to create a WPAD or ISATAP WINS entry. This may aid in man-in-the-middle and spoofing attacks. Other attacks are also possible.

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 Server
  • Microsoft Windows 2000 Server SP1
  • Microsoft Windows 2000 Server SP2
  • Microsoft Windows 2000 Server SP3
  • Microsoft Windows 2000 Server SP4
  • Microsoft Windows Server 2003 Datacenter Edition
  • Microsoft Windows Server 2003 Datacenter Edition Itanium SP1
  • 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 SP1
  • 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 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 Terminal Services
  • 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

Recommendations

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

Filter access to the affected computer at the network boundary if global access isn't needed. Restricting access to only trusted computers and networks might greatly reduce the likelihood of a successful exploit.

Disallow anonymous access to services. Permit access for trusted individuals only.

Restrict access to trusted and accountable users only.

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

Use NIDS to detect suspicious or anomalous network traffic. Monitor logs for signs of malicious activity.
The vendor has released an advisory and updates. Please see the references for details.

Credits

This issue was disclosed by the vendor.
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.

Threat Intelligence

Subscribe
Follow the Threat Intelligence Twitter feed
STAR Antimalware Protection Technologies
Internet Security Threat Report
Symantec DeepSight Screensaver