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  3. Microsoft Windows WINS Server Network Buffer Length Integer Overflow Vulnerability

Microsoft Windows WINS Server Network Buffer Length Integer Overflow Vulnerability

Risk

High

Date Discovered

August 11, 2009

Description

The Microsoft Windows WINS Server is prone to a remote integer-overflow vulnerability. An attacker can exploit this issue to execute arbitrary code with SYSTEM-level privileges. Successful exploits will completely compromise affected computers. Failed exploit attempts will result in a denial-of-service condition.

Technologies Affected

  • Microsoft Windows 2000 Advanced Server SP4
  • Microsoft Windows 2000 Datacenter Server SP4
  • Microsoft Windows 2000 Professional SP4
  • Microsoft Windows 2000 Server SP4

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.

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.

Implement multiple redundant layers of security.

Memory-protection schemes such as nonexecutable stack and heap configurations and randomly mapped memory segments will complicate exploits of memory-corruption vulnerabilities.
The vendor has released an advisory and updates. Please see the references for details.

Credits

LiGen of National University of Defense Technology
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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