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  3. Microsoft Windows Kernel NULL Pointer Dereference Local Privilege Escalation Vulnerability

Microsoft Windows Kernel NULL Pointer Dereference Local Privilege Escalation Vulnerability

Risk

High

Date Discovered

October 13, 2009

Description

Microsoft Windows is prone to a local privilege-escalation vulnerability that occurs in the Windows kernel. The vulnerability stems from a NULL-pointer dereference. An attacker can exploit this issue to execute arbitrary code with SYSTEM-level privileges. Successful exploits will result in the complete compromise of affected computers. Failed exploit attempts will cause a denial of service.

Technologies Affected

  • Avaya Meeting Exchange - Enterprise Edition
  • Avaya Meeting Exchange 5.0
  • Avaya Meeting Exchange 5.0 SP1
  • Avaya Meeting Exchange 5.0 SP2
  • Avaya Meeting Exchange 5.0.0.0.52
  • Avaya Meeting Exchange 5.1
  • Avaya Meeting Exchange 5.1 SP1
  • 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 Advanced Server SP4
  • Microsoft Windows 2000 Datacenter Server SP4
  • Microsoft Windows 2000 Professional SP4
  • Microsoft Windows 2000 Server SP4
  • Microsoft Windows Server 2003 Datacenter x64 Edition SP2
  • Microsoft Windows Server 2003 Itanium SP2
  • Microsoft Windows Server 2003 SP2
  • Microsoft Windows Server 2003 Standard Edition SP2
  • Microsoft Windows Server 2003 x64 SP2
  • Microsoft Windows Server 2008 Datacenter Edition
  • Microsoft Windows Server 2008 Enterprise Edition
  • Microsoft Windows Server 2008 Standard Edition
  • Microsoft Windows Server 2008 for 32-bit Systems
  • Microsoft Windows Server 2008 for Itanium-based Systems
  • Microsoft Windows Server 2008 for x64-based Systems
  • Microsoft Windows Vista Business
  • Microsoft Windows Vista Business 64-bit edition
  • Microsoft Windows Vista Business 64-bit edition SP1
  • Microsoft Windows Vista Business SP1
  • Microsoft Windows Vista Enterprise
  • Microsoft Windows Vista Enterprise 64-bit edition
  • Microsoft Windows Vista Enterprise 64-bit edition SP1
  • Microsoft Windows Vista Enterprise SP1
  • Microsoft Windows Vista Home Basic
  • Microsoft Windows Vista Home Basic 64-bit edition
  • Microsoft Windows Vista Home Basic 64-bit edition SP1
  • Microsoft Windows Vista Home Basic SP1
  • Microsoft Windows Vista Home Premium
  • Microsoft Windows Vista Home Premium 64-bit edition
  • Microsoft Windows Vista Home Premium 64-bit edition SP1
  • Microsoft Windows Vista Home Premium SP1
  • Microsoft Windows Vista Ultimate
  • Microsoft Windows Vista Ultimate 64-bit edition
  • Microsoft Windows Vista Ultimate 64-bit edition SP1
  • Microsoft Windows Vista Ultimate SP1
  • Microsoft Windows Vista x64 Edition
  • Microsoft Windows Vista x64 Edition SP1
  • Microsoft Windows XP Home SP2
  • Microsoft Windows XP Home SP3
  • Microsoft Windows XP Media Center Edition SP3
  • Microsoft Windows XP Professional SP2
  • Microsoft Windows XP Professional SP3
  • Microsoft Windows XP Professional x64 Edition SP2
  • Microsoft Windows XP Professional x64 Edition SP3
  • Microsoft Windows XP Tablet PC Edition SP3

Recommendations

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

To exploit this vulnerability, an attacker requires local access to an affected computer. Grant local access for trusted and accountable users only.

Do not accept or execute files from untrusted or unknown sources.

Never accept files from untrusted or unknown sources, because they may be malicious in nature. Avoid saving and opening email attachments from unknown or questionable sources.

Implement multiple redundant layers of security.

Various memory-protection schemes (such as nonexecutable and randomly mapped memory segments) may hinder an attacker's ability to exploit this vulnerability to execute arbitrary code.
Microsoft has released an advisory and updatese. Please see the references for details.

Credits

NSFocus Security Team
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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