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  3. Microsoft Windows Print Spooler Buffer Overflow Vulnerability

Microsoft Windows Print Spooler Buffer Overflow Vulnerability

Risk

High

Date Discovered

August 9, 2005

Description

Microsoft Windows Print Spooler service is prone to a buffer-overflow vulnerability. Specifically, this issue occurs when the Print Spooler service handles malformed messages containing excessive data. Exploiting this vulnerability allows attackers to escalate their privileges and gain unauthorized remote access, depending on the underlying operating system. A successful attack may allow an attacker to execute arbitrary code, which can allow the attacker to gain SYSTEM privileges.

Technologies Affected

  • 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
  • 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
  • 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
  • Microsoft Windows XP Home
  • Microsoft Windows XP Home SP1
  • Microsoft Windows XP Home SP2
  • Microsoft Windows XP Media Center Edition
  • Microsoft Windows XP Media Center Edition SP1
  • Microsoft Windows XP Media Center Edition SP2
  • 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

Recommendations

Permit local access for trusted individuals only. Where possible, use restricted environments and restricted shells.

Given the possibility of local attacks against some affected operating systems, ensure that only trusted users have local interactive access to vulnerable computers.

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

Use network access controls to regulate external access to computers at the network perimeter. Permit access for trusted or internal computers and networks only.

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

Deploy a NID sensor between the affected service and the network perimeter. Audit the logs regularly for evidence of possible attacks.

Implement multiple redundant layers of security.

Memory-protection schemes such as non-executable stack/heap configurations and randomly mapped memory segments may complicate exploitation of memory-corruption vulnerabilities.
Microsoft has released fixes to address this vulnerability in supported platforms. Microsoft has advised that some users may experience problems with network printing after installing security update 896423 on a computer that is running Windows 2000 with Service Pack 4. Please see Microsoft Knowledge Base Article 908506 for more information.

Credits

Discovery is credited to Kostya Kortchinsky from CERT RENATER.
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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