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  3. Microsoft Office Open Graphic Fonts CVE-2015-2431 Remote Code Execution Vulnerability

Microsoft Office Open Graphic Fonts CVE-2015-2431 Remote Code Execution Vulnerability

Risk

High

Date Discovered

August 11, 2015

Description

Microsoft Office is prone to a remote code-execution vulnerability. Successful exploits allow attackers to execute arbitrary code in the context of the vulnerable application. Failed exploit attempts will result in a denial-of-service condition.

Technologies Affected

  • Microsoft Live Meeting 2007 Console
  • Microsoft Lync 2010 (32-bit)
  • Microsoft Lync 2010 (64-bit)
  • Microsoft Lync 2010 Attendee
  • Microsoft Lync 2013 (32-bit) SP1
  • Microsoft Lync 2013 (64-bit) SP1
  • Microsoft Lync Basic 2013 (32-bit) SP1
  • Microsoft Lync Basic 2013 (64-bit) SP1
  • Microsoft Office 2007 SP3
  • Microsoft Office 2010 (32-bit edition) SP2
  • Microsoft Office 2010 (64-bit edition) SP2

Recommendations

Block external access at the network boundary, unless external parties require service.

If global access isn't needed, block access at the network perimeter to computers hosting the vulnerable operating system.

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 such as unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.

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

To reduce the likelihood of successful exploits, never handle files that originate from unfamiliar or untrusted sources.

Do not follow links provided by unknown or untrusted sources.

Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.

Do not use client software to access unknown or untrusted hosts from critical systems.

To limit the risk of exploits, never connect to unknown or untrusted services.
Updates are available. Please see the references or vendor advisory for more information.

Credits

Steven Vittitoe of Google Project Zero
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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