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  2. Security Response/
  3. Microsoft Windows TLS Protocol CBC Mode Information Disclosure Vulnerability

Microsoft Windows TLS Protocol CBC Mode Information Disclosure Vulnerability

Risk

Medium

Date Discovered

July 10, 2012

Description

Microsoft Windows is prone to an information disclosure vulnerability that occurs because of a design error in the TLS protocol when the cipher-block chaining (CBC) mode of operation is used. An attacker can exploit this issue to gain access to sensitive information that may aid in further attacks.

Technologies Affected

  • Avaya Aura Conferencing 6.0 SP1 Standard
  • Avaya Aura Conferencing 6.0 Standard
  • Avaya Aura Conferencing 6.0.0 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 5.0
  • Avaya Meeting Exchange - Client Registration Server 5.2
  • Avaya Meeting Exchange - Recording Server 5.0
  • Avaya Meeting Exchange - Recording Server 5.2
  • Avaya Meeting Exchange - Streaming Server 5.0
  • Avaya Meeting Exchange - Streaming Server 5.2
  • Avaya Meeting Exchange - Web Conferencing Server 5.0
  • Avaya Meeting Exchange - Web Conferencing Server 5.2
  • Avaya Meeting Exchange - Webportal 5.0
  • Avaya Meeting Exchange - Webportal 5.2
  • Avaya Messaging Application Server
  • Avaya Messaging Application Server 5.0
  • Avaya Messaging Application Server 5.2
  • Microsoft Windows 7
  • 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 Ultimate
  • Microsoft Windows 7 for 32-bit Systems
  • Microsoft Windows 7 for 32-bit Systems SP1
  • Microsoft Windows 7 for Itanium-based Systems
  • Microsoft Windows 7 for Itanium-based Systems SP1
  • Microsoft Windows 7 for x64-based Systems
  • Microsoft Windows 7 for x64-based Systems SP1
  • Microsoft Windows Server 2003
  • Microsoft Windows Server 2003 Datacenter Edition
  • Microsoft Windows Server 2003 Datacenter Edition Itanium
  • Microsoft Windows Server 2003 Datacenter Edition Itanium SP1
  • Microsoft Windows Server 2003 Datacenter Edition Itanium SP1 Beta 1
  • Microsoft Windows Server 2003 Datacenter Edition SP1
  • Microsoft Windows Server 2003 Datacenter Edition SP1 Beta 1
  • Microsoft Windows Server 2003 Datacenter x64 Edition
  • Microsoft Windows Server 2003 Datacenter x64 Edition SP2
  • Microsoft Windows Server 2003 Enterprise Edition
  • Microsoft Windows Server 2003 Enterprise Edition Itanium
  • Microsoft Windows Server 2003 Enterprise Edition Itanium SP1
  • Microsoft Windows Server 2003 Enterprise Edition Itanium SP1 Beta 1
  • Microsoft Windows Server 2003 Enterprise Edition Itanium SP2
  • Microsoft Windows Server 2003 Enterprise Edition Itanium Sp2 Itanium
  • Microsoft Windows Server 2003 Enterprise Edition SP1
  • Microsoft Windows Server 2003 Enterprise x64 Edition
  • Microsoft Windows Server 2003 Enterprise x64 Edition SP2
  • Microsoft Windows Server 2003 Itanium
  • Microsoft Windows Server 2003 Itanium SP1
  • Microsoft Windows Server 2003 Itanium SP2
  • Microsoft Windows Server 2003 SP1
  • Microsoft Windows Server 2003 SP2
  • Microsoft Windows Server 2003 Standard Edition
  • Microsoft Windows Server 2003 Standard Edition SP1
  • Microsoft Windows Server 2003 Standard Edition SP2
  • Microsoft Windows Server 2003 Standard x64 Edition
  • Microsoft Windows Server 2008
  • 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 Itanium
  • Microsoft Windows Server 2008 R2 Itanium SP1
  • Microsoft Windows Server 2008 R2 SP1
  • Microsoft Windows Server 2008 R2 Standard Edition
  • Microsoft Windows Server 2008 R2 for x64-based Systems
  • 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 Standard Edition
  • 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 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 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 Sp1 X86-Enterprise
  • Microsoft Windows Vista Business 64-bit edition Sp1 X86-Ultimate
  • Microsoft Windows Vista Business 64-bit edition X64-Enterprise
  • Microsoft Windows Vista Business 64-bit edition X64-Ultimate
  • Microsoft Windows Vista Business 64-bit edition X86-Enterprise
  • Microsoft Windows Vista Business 64-bit edition X86-Ultimate
  • 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 Service Pack 2
  • 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
  • Microsoft Windows XP
  • Microsoft Windows XP 64-bit Edition
  • Microsoft Windows XP 64-bit Edition SP1
  • Microsoft Windows XP 64-bit Edition Version 2003
  • Microsoft Windows XP 64-bit Edition Version 2003 SP1
  • Microsoft Windows XP Embedded
  • Microsoft Windows XP Embedded SP1
  • Microsoft Windows XP Embedded SP2
  • Microsoft Windows XP Embedded SP3
  • Microsoft Windows XP Home
  • Microsoft Windows XP Home SP1
  • Microsoft Windows XP Home SP2
  • Microsoft Windows XP Home SP3
  • Microsoft Windows XP Media Center Edition
  • Microsoft Windows XP Media Center Edition SP1
  • Microsoft Windows XP Media Center Edition SP2
  • Microsoft Windows XP Media Center Edition SP3
  • Microsoft Windows XP Professional
  • Microsoft Windows XP Professional SP1
  • Microsoft Windows XP Professional SP2
  • Microsoft Windows XP Professional SP3

Recommendations

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

If global access isn't needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.

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

To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.

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 including unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.
Updates are available. Please see the references for more information.

Credits

Microsoft
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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