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  3. Microsoft NNTP Component Heap Overflow Vulnerability

Microsoft NNTP Component Heap Overflow Vulnerability

Risk

High

Date Discovered

October 12, 2004

Description

The Microsoft Network News Transfer Protocol (NNTP) Component is prone to a buffer overflow condition. Successful exploitation of this vulnerability could allow remote code execution in the context of the process accessing the vulnerable component.

Technologies Affected

  • Avaya DefinityOne Media Servers
  • Avaya IP600 Media Servers
  • Avaya Modular Messaging (MSS) 1.1.0
  • Avaya Modular Messaging (MSS) 2.0.0
  • Avaya S3400 Message Application Server
  • Avaya S8100 Media Servers
  • Microsoft Exchange Server 2000
  • Microsoft Exchange Server 2000 SP1
  • Microsoft Exchange Server 2000 SP2
  • Microsoft Exchange Server 2000 SP3
  • Microsoft Exchange Server 2003
  • Microsoft Exchange Server 2003 SP1
  • 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 Server
  • Microsoft Windows 2000 Server SP1
  • Microsoft Windows 2000 Server SP2
  • Microsoft Windows 2000 Server SP3
  • Microsoft Windows 2000 Server SP4
  • Microsoft Windows NT Enterprise Server 4.0
  • Microsoft Windows NT Enterprise Server 4.0 SP1
  • Microsoft Windows NT Enterprise Server 4.0 SP2
  • Microsoft Windows NT Enterprise Server 4.0 SP3
  • Microsoft Windows NT Enterprise Server 4.0 SP4
  • Microsoft Windows NT Enterprise Server 4.0 SP5
  • Microsoft Windows NT Enterprise Server 4.0 SP6
  • Microsoft Windows NT Enterprise Server 4.0 SP6a
  • Microsoft Windows NT Server 4.0
  • Microsoft Windows NT Server 4.0 SP1
  • Microsoft Windows NT Server 4.0 SP2
  • Microsoft Windows NT Server 4.0 SP3
  • Microsoft Windows NT Server 4.0 SP4
  • Microsoft Windows NT Server 4.0 SP5
  • Microsoft Windows NT Server 4.0 SP6
  • Microsoft Windows NT Server 4.0 SP6a
  • Microsoft Windows Server 2003 Datacenter Edition
  • Microsoft Windows Server 2003 Datacenter Edition Itanium
  • Microsoft Windows Server 2003 Enterprise Edition
  • Microsoft Windows Server 2003 Enterprise Edition Itanium
  • Microsoft Windows Server 2003 Standard Edition
  • Microsoft Windows Server 2003 Web Edition

Recommendations

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

Block ports 119 and 563 at the network boundary unless the service is required by external users.

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

Network intrusion detection systems should be deployed to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained ingoing and outgoing traffic. This may indicate exploitation attempts or activity that results from successful exploitation.

Run all software as a nonprivileged user with minimal access rights.

If possible, run all server processes with the least amount of privileges to limit the consequences of successful exploitation.

Implement multiple redundant layers of security.

Memory protection schemes such as non-executable stack/heap configurations and randomly mapped memory segments will complicate exploitation of memory corruption vulnerabilities.

Filter incoming mail containing suspicious strings before it reaches the client application.

Filtering incoming messages may prevent attempts to exploit this vulnerability from reaching the affected application.
Microsoft has released a bulletin that includes fixes to address this issue for supported versions of the operating system.

Credits

Discovery is credited to Lucas Lavarello and Juliano Rizzo from Core Security Technologies.
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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