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  3. Symantec Norton Antivirus NAVOPTS.DLL ActiveX Control Remote Code Execution Vulnerability

Symantec Norton Antivirus NAVOPTS.DLL ActiveX Control Remote Code Execution Vulnerability



Date Discovered

May 9, 2007


Symantec Norton Antivirus ActiveX control is prone to a remote code-execution vulnerability. An attacker may exploit this issue by enticing victims into opening a maliciously crafted HTML document. Successful exploits will allow attackers to execute arbitrary code in the context of the user visiting a malicious web page. Failed exploit attempts will likely result in denial-of-service conditions.

Technologies Affected

  • Symantec Norton AntiVirus 2005
  • Symantec Norton AntiVirus 2006
  • Symantec Norton Internet Security 2005
  • Symantec Norton Internet Security 2006
  • Symantec Norton SystemWorks 2005
  • Symantec Norton SystemWorks 2006


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

To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.

Do not follow links provided by unknown or untrusted sources.

Attackers could exploit this vulnerability by enticing a user to visit a malicious website. Do not follow links provided by sources of questionable integrity.

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

Since a successful exploit of this issue allows malicious code to execute in web clients, consider disabling support for script code and active content within the client browser. Note that this mitigation tactic might adversely affect legitimate websites that rely on the execution of browser-based script code.

Do not open email messages from unknown or untrusted individuals.

Attackers could exploit this vulnerability through HTML email messages. Never accept any email from sources of questionable integrity.
Symantec released an advisory and fixes to address this issue. Please see the references for more information.


Peter Vreugdenhil working with iDefense is credited with discovering this issue.
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.

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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