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  3. Microsoft Windows Kernel 'Win32k.sys' TrueType Font File Remote Denial of Service Vulnerability

Microsoft Windows Kernel 'Win32k.sys' TrueType Font File Remote Denial of Service Vulnerability

Risk

Medium

Date Discovered

October 11, 2011

Description

Microsoft Windows is prone to a remote denial-of-service vulnerability. A remote attacker can exploit this issue to crash the Windows kernel, denying service to legitimate users.

Technologies Affected

  • Avaya Aura Conferencing 6.0 Standard
  • Avaya CallPilot 4.0
  • Avaya CallPilot 5.0
  • Avaya Communication Server 1000 Telephony Manager 3.0
  • Avaya Communication Server 1000 Telephony Manager 4.0
  • Avaya Meeting Exchange - Client Registration Server
  • Avaya Meeting Exchange - Recording Server
  • Avaya Meeting Exchange - Web Conferencing Server
  • Avaya Meeting Exchange - Webportal
  • 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 Meeting Exchange 5.2
  • Avaya Meeting Exchange 5.2 SP1
  • Avaya Meeting Exchange 5.2 SP2
  • Avaya Messaging Application Server 4
  • Avaya Messaging Application Server 5
  • Avaya Messaging Application Server 5.2
  • Microsoft Windows 7
  • Microsoft Windows 7 Beta
  • Microsoft Windows 7 Home Premium
  • Microsoft Windows 7 Home Premium - Sp1 X32
  • Microsoft Windows 7 Home Premium - Sp1 X64
  • Microsoft Windows 7 Professional
  • Microsoft Windows 7 RC
  • Microsoft Windows 7 Starter
  • Microsoft Windows 7 Ultimate
  • Microsoft Windows 7 XP Mode
  • Microsoft Windows 7 for 32-bit Systems
  • Microsoft Windows 7 for 32-bit Systems SP1
  • Microsoft Windows 7 for x64-based Systems
  • Microsoft Windows 7 for x64-based Systems SP1
  • Microsoft Windows Server 2008 - Sp2 Enterprise X64
  • Microsoft Windows Server 2008 Datacenter Edition
  • Microsoft Windows Server 2008 Datacenter Edition Release Candidate
  • Microsoft Windows Server 2008 Datacenter Edition SP2
  • Microsoft Windows Server 2008 Enterprise Edition
  • Microsoft Windows Server 2008 Enterprise Edition Release Candidate
  • Microsoft Windows Server 2008 Enterprise Edition SP2
  • Microsoft Windows Server 2008 R2
  • Microsoft Windows Server 2008 R2 Datacenter
  • Microsoft Windows Server 2008 R2 Datacenter SP1
  • Microsoft Windows Server 2008 R2 Enterprise Edition
  • Microsoft Windows Server 2008 R2 Itanium
  • Microsoft Windows Server 2008 R2 Itanium SP1
  • Microsoft Windows Server 2008 R2 Standard Edition
  • Microsoft Windows Server 2008 R2 for x64-based Systems SP1
  • Microsoft Windows Server 2008 R2 x64
  • Microsoft Windows Server 2008 R2 x64 SP1
  • Microsoft Windows Server 2008 SP2 Beta
  • Microsoft Windows Server 2008 Standard Edition
  • Microsoft Windows Server 2008 Standard Edition - Gold
  • Microsoft Windows Server 2008 Standard Edition - Gold Datacenter
  • Microsoft Windows Server 2008 Standard Edition - Gold Enterprise
  • Microsoft Windows Server 2008 Standard Edition - Gold Hpc
  • Microsoft Windows Server 2008 Standard Edition - Gold Itanium
  • Microsoft Windows Server 2008 Standard Edition - Gold Standard
  • Microsoft Windows Server 2008 Standard Edition - Gold Storage
  • Microsoft Windows Server 2008 Standard Edition - Gold Web
  • Microsoft Windows Server 2008 Standard Edition - Sp2 Hpc
  • Microsoft Windows Server 2008 Standard Edition - Sp2 Storage
  • Microsoft Windows Server 2008 Standard Edition - Sp2 Web
  • Microsoft Windows Server 2008 Standard Edition Itanium
  • Microsoft Windows Server 2008 Standard Edition R2
  • Microsoft Windows Server 2008 Standard Edition R2 SP1
  • Microsoft Windows Server 2008 Standard Edition Release Candidate
  • Microsoft Windows Server 2008 Standard Edition SP2
  • Microsoft Windows Server 2008 Standard Edition X64
  • Microsoft Windows Server 2008 for 32-bit Systems
  • Microsoft Windows Server 2008 for 32-bit Systems SP2
  • Microsoft Windows Server 2008 for Itanium-based Systems
  • Microsoft Windows Server 2008 for Itanium-based Systems R2
  • Microsoft Windows Server 2008 for Itanium-based Systems SP2
  • Microsoft Windows Server 2008 for x64-based Systems
  • Microsoft Windows Server 2008 for x64-based Systems R2
  • Microsoft Windows Server 2008 for x64-based Systems SP2
  • Microsoft Windows Vista
  • Microsoft Windows Vista 1.0
  • Microsoft Windows Vista 2.0
  • Microsoft Windows Vista 3.0
  • Microsoft Windows Vista Beta
  • Microsoft Windows Vista Beta 1
  • Microsoft Windows Vista Beta 2
  • Microsoft Windows Vista Business
  • Microsoft Windows Vista Business 64-bit edition
  • Microsoft Windows Vista Business 64-bit edition SP1
  • Microsoft Windows Vista Business 64-bit edition SP2
  • Microsoft Windows Vista Business 64-bit edition Sp1 X64-Enterprise
  • Microsoft Windows Vista Business 64-bit edition Sp1 X64-Home Premium
  • Microsoft Windows Vista Business 64-bit edition Sp1 X64-Ultimate
  • Microsoft Windows Vista Business 64-bit edition X64-Enterprise
  • Microsoft Windows Vista Business 64-bit edition X64-Ultimate
  • Microsoft Windows Vista Business SP1
  • Microsoft Windows Vista Business SP2
  • Microsoft Windows Vista December CTP
  • Microsoft Windows Vista December CTP Gold
  • Microsoft Windows Vista December CTP SP1
  • Microsoft Windows Vista December CTP SP2
  • Microsoft Windows Vista December CTP X64
  • Microsoft Windows Vista Enterprise
  • Microsoft Windows Vista Enterprise 64-bit edition
  • Microsoft Windows Vista Enterprise 64-bit edition SP1
  • Microsoft Windows Vista Enterprise 64-bit edition SP2
  • Microsoft Windows Vista Enterprise SP1
  • Microsoft Windows Vista Enterprise SP2
  • 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 64-bit edition SP2
  • Microsoft Windows Vista Home Basic 64-bit edition Sp1 X64
  • Microsoft Windows Vista Home Basic 64-bit edition Sp2 X64
  • Microsoft Windows Vista Home Basic SP1
  • Microsoft Windows Vista Home Basic SP2
  • 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 64-bit edition SP2
  • Microsoft Windows Vista Home Premium SP1
  • Microsoft Windows Vista Home Premium SP2
  • Microsoft Windows Vista SP1
  • Microsoft Windows Vista SP2
  • Microsoft Windows Vista SP2 Beta
  • Microsoft Windows Vista Ultimate
  • Microsoft Windows Vista Ultimate 64-bit edition
  • Microsoft Windows Vista Ultimate 64-bit edition SP1
  • Microsoft Windows Vista Ultimate 64-bit edition SP2
  • Microsoft Windows Vista Ultimate SP1
  • Microsoft Windows Vista Ultimate SP2
  • Microsoft Windows Vista x64 Edition
  • Microsoft Windows Vista x64 Edition SP1
  • Microsoft Windows Vista x64 Edition SP2

Recommendations

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

If global access isn't needed, block access at the network perimeter to computers hosting the vulnerable operating system.

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

Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity such as unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.

Do not follow links provided by unknown or untrusted sources.

To reduce the likelihood of successful exploits, never follow links provided by unfamiliar or untrusted sources.

Do not use client software to access unknown or untrusted hosts from critical systems.

To limit the risk of exploits, never connect to unknown or untrusted services.
Vendor updates are available. Please see the references for more information.

Credits

Maik Wellmann
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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