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Microsoft Visual Basic for Applications Text Parsing Stack Buffer Overflow Vulnerability

Risk

High

Date Discovered

May 11, 2010

Description

Microsoft Visual Basic for Applications (VBA) is prone to a remote stack-based buffer-overflow vulnerability because of an error related to searching for embedded ActiveX controls within a Microsoft Office document. An attacker could exploit this issue to corrupt stack memory and execute arbitrary code with the privileges of the currently logged-in user. Failed exploit attempts may crash applications that use VBA.

Technologies Affected

  • IBM CATIA V5 Release 18
  • IBM CATIA V5 Release 19
  • Microsoft Office 2003
  • Microsoft Office 2003 SP1
  • Microsoft Office 2003 SP2
  • Microsoft Office 2003 SP3
  • Microsoft Office 2007
  • Microsoft Office 2007 SP1
  • Microsoft Office 2007 SP2
  • Microsoft Office XP
  • Microsoft Office XP SP1
  • Microsoft Office XP SP2
  • Microsoft Office XP SP3
  • Microsoft Visual Basic for Applications
  • Microsoft Visual Basic for Applications SDK 6.0

Recommendations

Deploy network intrusion detection systems to monitor network traffic for malicious activity.

Deploy NIDS to monitor network traffic for suspicious activity such as 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 files may be hosted on a webpage, sent via email or instant messaging, or delivered through some other means. Never accept or open any files that originate from an untrusted source.

Do not follow links provided by unknown or untrusted sources.

Do not visit sites of questionable integrity, especially if solicited to do so by an untrusted or unfamiliar 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 updates and an advisory. Please see the references for details.

Credits

NSFocus Security Team
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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