A Vulnerability is a state in a computing system (or set of systems) which either (a) allows an attacker to execute commands as another user, (b) allows an attacker to access data that is contrary to the specified access restrictions for that data, (c) allows an attacker to pose as another entity, or (d) allows an attacker to conduct a denial of service.Advisories relating to Symantec products may be viewed here.

Microsoft Office Outlook CVE-2017-11776 Information Disclosure Vulnerability

Date Discovered:
10 October 2017
Microsoft Office Outlook is prone to an information-disclosure vulnerability. Attackers can exploit this issue to gain access to the sensitive information that may aid in further attacks.
Technologies Affected
  • Microsoft Outlook 2016 (32-bit editions)
  • Microsoft Outlook 2016 (64-bit editions)
  • Block external access at the network boundary, unless external parties require service.
    If global access isn't needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.
  • 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 may indicate exploit attempts or activity that results from successful exploits.
  • Do not accept communications that originate from unknown or untrusted sources.
    Do not open or view email from unknown or untrusted sources.
Updates are available. Please see the references or vendor advisory for more information.
Florian Gattermeier and Heinrich WiederkehrERNW GmbH Simon Hofer and Stefan ViehböckSEC Consult Vulnerability Lab

Copyright (c) 2009 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


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 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.