1. Symantec/
  2. Security Response/
  3. Microsoft Internet Explorer XSS Filter CVE-2016-3212 Security Bypass Vulnerability

Microsoft Internet Explorer XSS Filter CVE-2016-3212 Security Bypass Vulnerability

Risk

Medium

Date Discovered

June 14, 2016

Description

Microsoft Internet Explorer is prone to a security-bypass vulnerability that affects the XSS Filter. An attacker can exploit this issue by tricking an unsuspecting victim into viewing a page containing malicious content. They can then execute arbitrary script code in the context of the user running the application. This may allow the attacker to steal cookie-based authentication credentials and other sensitive data that may aid in further attacks. Other attacks are possible. Internet Explorer 9, 10, and 11 are vulnerable.

Technologies Affected

  • Microsoft Internet Explorer 10
  • Microsoft Internet Explorer 11
  • Microsoft Internet Explorer 9

Recommendations

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

Run all non-administrative software as a non-administrative user with the least amount of privileges required to successfully operate. This will greatly reduce the potential damage that successful exploitation may achieve.

Do not follow links provided by unknown or untrusted sources.

Never follow links provided by unknown or untrusted sources.

Set web browser security to disable the execution of script code or active content.

Since the exploitation of some of these issues allows the execution of malicious script code in web clients, consider disabling support for script code and active content within the client browser. Note that this mitigation tactic might adversely affect websites that rely on the execution of browser-based script code.
Updates are available. Please see the references or vendor advisory for more information.

Credits

Masato Kinugawa of Cure53
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.

Threat Intelligence

Subscribe
Follow the Threat Intelligence Twitter feed
STAR Antimalware Protection Technologies
2016 Internet Security Threat Report, Volume 21
  • Twitter
  • Facebook
  • LinkedIn
  • Google+
  • YouTube