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Microsoft Office PICT Filter Parsing Remote Heap Buffer Overflow Vulnerability

Risk

High

Date Discovered

August 12, 2008

Description

Microsoft Office is prone to a remote heap-based buffer-overflow vulnerability because the software fails to perform adequate boundary-checks on user-supplied data. An attacker could exploit this issue by enticing a victim to open a malicious PICT file. Successfully exploiting this issue would allow the attacker to corrupt memory and execute arbitrary code in the context of the currently logged-in user. Failed exploit attempts will result in a denial-of-service condition.

Technologies Affected

  • Microsoft Office 2000
  • 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 Converter Pack
  • Microsoft Office XP
  • Microsoft Office XP SP1
  • Microsoft Office XP SP2
  • Microsoft Office XP SP3
  • Microsoft Project 2002
  • Microsoft Project 2002 SP1
  • Microsoft Works 8.0

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. Please see the references for more information.

Credits

Damian Put working with the Zero Day Initiative (ZDI)
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.
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