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  3. Microsoft Internet Explorer 'CAttrArray' Object Remote Code Execution Vulnerability

Microsoft Internet Explorer 'CAttrArray' Object Remote Code Execution Vulnerability

Risk

High

Date Discovered

December 8, 2009

Description

Microsoft Internet Explorer is prone to a remote code-execution vulnerability. Attackers can exploit this issue to execute arbitrary code in the context of the user running the application. Successful exploits will compromise the application and possibly the computer. Failed attacks may cause denial-of-service conditions.

Technologies Affected

  • Microsoft Internet Explorer 8
  • Nortel Networks CallPilot 1002rp
  • Nortel Networks CallPilot 1005r
  • Nortel Networks CallPilot 200i
  • Nortel Networks CallPilot 201i
  • Nortel Networks CallPilot 202i
  • Nortel Networks CallPilot 600r
  • Nortel Networks CallPilot 702t
  • Nortel Networks CallPilot 703t
  • Nortel Networks Contact Center Administration
  • Nortel Networks Contact Center Administration CCMA 6.0
  • Nortel Networks Contact Center Administration CCMA 7.0
  • Nortel Networks Contact Center Express
  • Nortel Networks Contact Center Multimedia
  • Nortel Networks Contact Center Multimedia & Outbound 6.0
  • Nortel Networks Contact Center Multimedia & Outbound 7.0
  • Nortel Networks Media Processing Server
  • Nortel Networks Media Processing Svr 100
  • Nortel Networks Media Processing Svr 1000 Rel 3.0
  • Nortel Networks Media Processing Svr 500 Rel 3.0
  • Nortel Networks Multimedia Comm Mas
  • Nortel Networks Peri Application
  • Nortel Networks Peri Workstation
  • Nortel Networks Self-Service Media Processing Server
  • Nortel Networks Self-Service Peri Application
  • Nortel Networks Self-Service Peri Workstation
  • Nortel Networks Self-Service Speech Server

Recommendations

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. 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 this issue 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.

Memory-protection schemes (such as nonexecutable stack and heap configurations and randomly mapped memory segments) will complicate exploits of memory-corruption vulnerabilities.
The vendor has released an advisory along with fixes. Please see the references for details.

Credits

An anonymous researcher working with TippingPoint and the Zero Day Initiative
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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