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  3. Microsoft Word Malformed Record Value Remote Code Execution Vulnerability

Microsoft Word Malformed Record Value Remote Code Execution Vulnerability

Risk

High

Date Discovered

July 8, 2008

Description

Microsoft Word is prone to a remote code-execution vulnerability. Successful attacks may allow arbitrary malicious code to run in the context of the user running the application. Failed attack attempts may result in a crash. Reports indicate that this issue affects Microsoft Office XP. The DeepSight Threat Analysis Team has confirmed that this issue affects Microsoft Office XP with Word 2002 and leads to a crash in Word 2000 and Word 2003.

Technologies Affected

  • Microsoft Office XP
  • Microsoft Office XP SP3
  • Microsoft Word 2000
  • Microsoft Word 2002
  • Microsoft Word 2002 SP3
  • Microsoft Word 2003
  • Microsoft Word 2003 SP2
  • Microsoft Word 2003 SP3

Recommendations

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

To mitigate the impact of a successful exploit, run the affected application as a 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 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.

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

Implement multiple redundant layers of security.

Since this issue may be leveraged to execute code, we recommend memory-protection schemes, such as nonexecutable stack/heap configurations and randomly mapped memory segments. This tactic may complicate exploit attempts of memory-corruption vulnerabilities.
The vendor has released an advisory and updates to address this issue. Please see the referenced advisory for details on obtaining and applying the appropriate updates.

Credits

In-the-wild samples of code exploiting this issue were supplied to Symantec by SANS.
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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