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Category:   Application (Security)  >   Norton Internet Security Vendors:   Symantec
Norton Internet Security 'NAVOPTS.DLL' ActiveX Control Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1018031
SecurityTracker URL:
CVE Reference:   CVE-2006-3456   (Links to External Site)
Date:  May 9 2007
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2005, 2006
Description:   A vulnerability was reported in Norton Internet Security. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can create specially crafted HTML that, when loaded by the target user, will trigger a flaw in the 'NAVOPTS.DLL' ActiveX control and allow other Symantec controls to be executed. This allows the remote user to execute arbitrary code on the target system. The code will run with the privileges of the target user.

The CLSID of the affected control is: 085ABFE2-D753-445C-8A2A-D4BD46CE0811

Norton AntiVirus and Norton SystemWorks are also affected.

Symantec Client Security and Symantec AntiVirus Corporate Edition are not affected.

The vendor was notified on December 13, 2006.

Peter Vreugdenhil discovered this vulnerability. iDefense reported this vulnerability.

Impact:   A remote user can create HTML that, when loaded by the target user, will execute arbitrary code on the target user's system.
Solution:   The vendor has issued a fix, available via LiveUpdate.

The Symantec advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Exception handling error
Underlying OS:  Windows (Any)

Message History:   None.

 Source Message Contents

Subject:  iDefense Security Advisory 05.09.07: Symantec Norton Internet Security

Symantec Norton Internet Security 2006 COM Object Security ByPass

iDefense Security Advisory 05.09.07
May 09, 2007


Norton Internet Security 2006 is a comprehensive system security suite
that offers protection from spyware, viruses, identity theft, spam, and
malicious network traffic. More information can be found on the vendors
site at the following URL.


Remote exploitation of a design error vulnerability in an ActiveX
control installed by Symantec Norton Internet Security 2006 could allow
for the execution of arbitrary code.

Norton Internet Security 2006 installs the following ActiveX control
which is registered as safe for scripting:

  Progid: Symantec.Norton.AntiVirus.NAVOptions
  Clsid: 085ABFE2-D753-445C-8A2A-D4BD46CE0811
  File: C:\Program Files\Norton Internet Security\Norton

This control was designed for use in a application embedded web browser
rather than a native Internet Explorer window. When this control is
loaded in a standard browser window, it throws an error during
initialization which leaves the browser in a defunct state. After the
error dialog displays, other Symantec ActiveX Controls can be created
without error even if they are not marked as safe for scripting. This
can lead to remote code execution if the unsafe controls contain
exploitable methods.


Exploitation allows malicious websites to load certain Symantec ActiveX
Controls which were not designed or secured for web use.

This condition can lead to the execution of arbitrary code in situations
where unsafe controls contain exploitable vulnerabilities.


iDefense confirmed the existence of this vulnerability within version of NavOpts.dll as distributed with Norton Internet Security
2006. Prior versions are suspected to be vulnerable.


Setting the kill-bit for the ActiveX control will prevent this component
from loading in Internet Explorer. Although this will prevent potential
exploitation, it may also negatively impact the functionality of the


Symantec has addressed this vulnerability with a software update. The
update is available via their LiveUpdate channels. For more
information, consult their advisory at the following URL.


The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2006-3456 to this issue. This is a candidate for inclusion in
the CVE list (, which standardizes names for
security problems.


12/13/2006  Initial vendor notification
12/13/2006  Initial vendor response
05/09/2007  Coordinated public disclosure


This vulnerability was reported to iDefense by Peter Vreugdenhil.

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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
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