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Microsoft Windows Client Service For Netware Remote Code Execution Vulnerability

Risk

High

Date Discovered

November 14, 2006

Description

Microsoft Client Service for Netware is prone to a remote code-execution vulnerability. A remote attacker can exploit this vulnerability to execute arbitrary code in the context of the user running the affected service. Note that the Client Service for Netware is not installed by default on any affected operating system.

Technologies Affected

  • Avaya Messaging Application Server
  • Avaya S8100 Media Servers
  • Avaya S8100 Media Servers R10
  • Avaya S8100 Media Servers R11
  • Avaya S8100 Media Servers R12
  • Avaya S8100 Media Servers R6
  • Avaya S8100 Media Servers R7
  • Avaya S8100 Media Servers R8
  • Avaya S8100 Media Servers R9
  • HP Storage Management Appliance 2.1
  • 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 Advanced Server SP4
  • 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 Datacenter Server SP4
  • Microsoft Windows 2000 Professional
  • Microsoft Windows 2000 Professional SP1
  • Microsoft Windows 2000 Professional SP2
  • Microsoft Windows 2000 Professional SP3
  • Microsoft Windows 2000 Professional SP4
  • 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 SP1
  • Microsoft Windows Server 2003 Datacenter Edition SP1 Beta 1
  • Microsoft Windows Server 2003 Enterprise Edition
  • Microsoft Windows Server 2003 Enterprise Edition SP1
  • Microsoft Windows Server 2003 Enterprise Edition SP1 Beta 1
  • Microsoft Windows Server 2003 Standard Edition
  • Microsoft Windows Server 2003 Standard Edition SP1
  • Microsoft Windows Server 2003 Standard Edition SP1 Beta 1
  • Microsoft Windows Server 2003 Web Edition
  • Microsoft Windows Server 2003 Web Edition SP1
  • Microsoft Windows Server 2003 Web Edition SP1 Beta 1
  • Microsoft Windows XP
  • Microsoft Windows XP 64-bit Edition
  • Microsoft Windows XP 64-bit Edition SP1
  • Microsoft Windows XP 64-bit Edition Version 2003
  • Microsoft Windows XP 64-bit Edition Version 2003 SP1
  • Microsoft Windows XP Embedded
  • Microsoft Windows XP Embedded SP1
  • Microsoft Windows XP Gold
  • Microsoft Windows XP Home
  • Microsoft Windows XP Home SP1
  • Microsoft Windows XP Professional
  • Microsoft Windows XP Professional SP1
  • Microsoft Windows XP Professional SP2
  • Microsoft Windows XP Tablet PC Edition
  • Microsoft Windows XP Tablet PC Edition SP1
  • Microsoft Windows XP Tablet PC Edition SP2
  • Nortel Networks Centrex IP Element Manager 7.0.0
  • Nortel Networks Centrex IP Element Manager 8.0.0
  • Nortel Networks Centrex IP Element Manager 9.0.0

Recommendations

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

Block access to affected computers at the network perimeter. Allow only trusted computers and networks to have access to the resources. This includes blocking unauthorized access to ports 139 and 445.

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

Deploy NIDS to monitor network traffic for signs of suspicious or anomalous activity. This may help detect malicious actions that an attacker may take after successfully exploiting vulnerabilities in applications. Review all applicable logs regularly.

Implement multiple redundant layers of security.

Various memory-protection schemes (such as non-executable and randomly mapped memory segments) may hinder an attacker's ability to exploit this vulnerability to execute arbitrary code.
Microsoft has released updates to address this vulnerability on supported platforms. Please see the referenced bulletin for more information.

Credits

Discovery is credited to Peter Winter-Smith of NGS Software and Sam Arun Raj of McAfee.
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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