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  3. Microsoft Office Malformed PNG File Remote Code Execution Vulnerability

Microsoft Office Malformed PNG File Remote Code Execution Vulnerability

Risk

High

Date Discovered

July 11, 2006

Description

Microsoft Office is prone to a remote code-execution vulnerability when handling a malformed PNG graphic file. The issue occurs when an Office application such as Excel, Word, or PowerPoint tries to open a malformed PNG graphic file. An attacker could exploit this vulnerability to cause memory corruption and subsequently to execute malicious code in the context of the user running the affected application.

Technologies Affected

  • Microsoft Office 2000
  • Microsoft Office 2000 Chinese Version
  • Microsoft Office 2000 Japanese Version
  • Microsoft Office 2000 Korean Version
  • Microsoft Office 2000 SP1
  • Microsoft Office 2000 SP2
  • Microsoft Office 2000 SP3
  • Microsoft Office 2003
  • Microsoft Office 2003 SP1
  • Microsoft Office 2003 SP2
  • Microsoft Office 2003 SP3
  • Microsoft Office XP
  • Microsoft Office XP SP1
  • Microsoft Office XP SP2
  • Microsoft Office XP SP3
  • Microsoft Project 2000
  • Microsoft Project 2002
  • Microsoft Project 2002 SP1

Recommendations

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

Execute all software as a user with minimal privileges. Use additional precautions such as restrictive environments to insulate software that may potentially handle malicious content.

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 exploitation attempts or activity that results from successful exploitation.

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

For this vulnerability to be triggered, a user must open a malicious file with a vulnerable application. Never use a critical computer to process files that originate from 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 exploitation of memory-corruption vulnerabilities.
The vendor has released an advisory to address this issue in supported versions of affected software.

Credits

Fortinet Inc. is credited with the discovery of this vulnerability.
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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