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  3. Microsoft Windows SChannel Certificate Request Remote Code Execution Vulnerability

Microsoft Windows SChannel Certificate Request Remote Code Execution Vulnerability

Risk

High

Date Discovered

August 10, 2010

Description

Microsoft Windows is prone to a remote code-execution vulnerability that affects SChannel. Successful exploits will allow an attacker to run arbitrary code in the context of the currently logged-in user.

Technologies Affected

  • Avaya Aura Conferencing 6.0
  • Avaya Aura Conferencing 6.0 Standard
  • Avaya Meeting Exchange - Client Registration Server
  • Avaya Meeting Exchange - Recording Server
  • Avaya Meeting Exchange - Streaming Server
  • Avaya Meeting Exchange - Web Conferencing Server
  • Avaya Meeting Exchange - Webportal
  • Avaya Messaging Application Server
  • Avaya Messaging Application Server 4
  • Avaya Messaging Application Server 5
  • 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 7 Home Premium
  • Microsoft Windows 7 Professional
  • Microsoft Windows 7 Starter
  • Microsoft Windows 7 Ultimate
  • Microsoft Windows 7 for 32-bit Systems
  • Microsoft Windows 7 for x64-based Systems
  • Microsoft Windows Server 2003 Datacenter x64 Edition SP2
  • Microsoft Windows Server 2003 Enterprise 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 Web Edition SP2
  • Microsoft Windows Server 2003 x64 SP2
  • Microsoft Windows Server 2008 Datacenter Edition
  • Microsoft Windows Server 2008 Datacenter Edition SP2
  • Microsoft Windows Server 2008 Enterprise Edition
  • Microsoft Windows Server 2008 Enterprise Edition SP2
  • Microsoft Windows Server 2008 R2 Datacenter
  • Microsoft Windows Server 2008 Standard Edition
  • Microsoft Windows Server 2008 Standard Edition Itanium
  • 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 Business 64-bit edition SP1
  • Microsoft Windows Vista Business 64-bit edition SP2
  • Microsoft Windows Vista Business SP1
  • Microsoft Windows Vista Business SP2
  • 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 64-bit edition SP1
  • Microsoft Windows Vista Home Basic 64-bit edition SP2
  • Microsoft Windows Vista Home Basic SP1
  • Microsoft Windows Vista Home Basic SP2
  • 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 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 SP1
  • Microsoft Windows Vista x64 Edition SP2
  • Microsoft Windows XP Embedded SP3
  • Microsoft Windows XP Home SP3
  • Microsoft Windows XP Media Center Edition SP3
  • Microsoft Windows XP Professional SP3
  • Microsoft Windows XP Professional x64 Edition SP2
  • Microsoft Windows XP Tablet PC Edition SP3

Recommendations

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. This includes but is not limited to requests that include NOP sleds and 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.

Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.

Set web browser security to disable the execution of script code or active content.

Since a successful exploit of these issues requires malicious code to execute in web clients, consider disabling support for script code and active content within the client browser. Note that this mitigation tactic might adversely affect legitimate websites that rely on the execution of browser-based script code.

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.
Updates are available to address this issue. Please see the references for more information.

Credits

The vendor disclosed this issue.
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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