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Microsoft Word 2000 Malformed Function Code Execution Vulnerability

Risk

High

Date Discovered

January 25, 2007

Description

Microsoft Word 2000 is prone to a remote code-execution vulnerability. Microsoft Word 2000 is confirmed vulnerable to a remote code-execution issue. Exploit attempts against Word 2003/XP will consume all CPU resources and will cause a denial of service for legitimate users. Note that this issue is distinct from issues described in BID 21589 (Microsoft Word Code Execution Vulnerability), BID 21451 (Microsoft Word Malformed String Remote Code Execution Vulnerability), and BID 21518 (Microsoft Word Malformed Data Structures Code Execution Vulnerability).

Technologies Affected

  • Microsoft Office 2000 SP1
  • Microsoft Office 2000 SP2
  • Microsoft Office 2000 SP3
  • Microsoft Office 2003 SP1
  • Microsoft Office 2003 SP2
  • 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.

Deploy NIDS to monitor network traffic for signs of suspicious or anomalous activity. This may help detect malicious actions that an attacker may take after successfully exploiting vulnerabilities in applications. Review all applicable logs regularly.

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

Users should never accept files from untrusted or unknown sources, because they may be malicious in nature. Avoid opening email attachments from unknown or questionable sources.

Do not follow links provided by unknown or untrusted sources.

Users should avoid websites of questionable integrity. Never follow links supplied by unknown or untrusted sources.

Implement multiple redundant layers of security.

Since this issue may be leveraged to execute code, we recommend memory-protection schemes, such as non-executable stack/heap configurations and randomly mapped memory segments. This tactic may complicate exploit attempts of memory-corruption vulnerabilities.
Microsoft has released an advisory detailing updates to address this issue in supported versions of affected applications.

Credits

Reported by Symantec.
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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