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Microsoft Word 2000 WordPerfect Converter Remote Code Execution Vulnerability

Risk

High

Date Discovered

April 14, 2009

Description

Microsoft Word 2000 is prone to a remote code-execution vulnerability because it fails to properly validate an unspecified string when parsing a WordPerfect document. An attacker could exploit this issue to execute arbitrary code with the privileges of the currently logged-in user. Failed exploit attempts may result in denial-of-service conditions.

Technologies Affected

  • 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 Office Converter Pack
  • Microsoft Word 2000
  • Microsoft Word 2000 SP2
  • Microsoft Word 2000 SP3
  • Microsoft Word 2000 SR1
  • Microsoft Word 2000 SR1a

Recommendations

Deploy network intrusion detection systems to monitor network traffic for malicious 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 a successful exploit.

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

Malicious media files may be hosted on a webpage or distributed via email, instant messaging, or other means. Never accept or open any files that originate from an untrusted source.

Implement multiple redundant layers of security.

Memory-protection schemes such as nonexecutable stack/heap configurations and randomly mapped memory segments may complicate exploits of memory-corruption vulnerabilities.

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

Ensure that all nonadministrative tasks, such as browsing the web and reading email, are performed as an unprivileged user with minimal access rights.
The vendor has released an advisory and updates. Please see the references for more information. UPDATE (April 16, 2009): Before installing this update, users are advised to undo any workarounds related to disabling converters.

Credits

Michael Sutton of VeriSign iDefense Labs
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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