Public Vulnerability Reports

Symantec Norton Internet Security 2008 ActiveX Control Buffer Overflow Vulnerability



Norton Internet Security 2008 is a system security suite that offers protection from spyware, viruses, identity theft, spam, and malicious network traffic. More information can be found on the vendor's site at the following URL.


Remote exploitation of a buffer overflow vulnerability in an ActiveX control installed by Symantec Norton Internet Security 2008 could allow for the execution of arbitrary code.

Norton Internet Security 2008 installs the following ActiveX control which is registered as safe for scripting:

 Clsid: 3451DEDE-631F-421c-8127-FD793AFC6CC8 File: C:PROGRA~1COMMON~1SYMANT~1SUPPOR~1SymAData.dll Version 

This control contains an exploitable stack based buffer overflow.


Exploitation allows attackers to execute arbitrary code with the privileges of the currently logged in user. In order for exploitation to occur, an attacker would have to lure a vulnerable user to a malicious web site.

While this control is marked as safe for scripting, the control has been designed so that it can only be run from the "" domain. In practice this requirement can be bypassed through the use of any Cross Site Scripting (XSS) vulnerabilities in the Symantec domain. Exploitation could also occur through the use of DNS poisoning attacks.


iDefense confirmed that this vulnerability exists in version of the control that is installed with the 2008 version of Norton Internet Security. Other versions may also be available.


Setting the kill-bit for this control will prevent it from being loaded within Internet Explorer. However, doing so will prevent legitimate use of the control.


Symantec has addressed this vulnerability by releasing updates. For more information, refer to their advisory at the following URL.


The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-0312 to this issue. This is a candidate for inclusion in the CVE list (, which standardizes names for security problems.


12/05/2007 Initial vendor notification
12/05/2007 Initial vendor response
04/02/2008 Coordinated public disclosure


This vulnerability was reported to iDefense by Peter Vreugdenhil.

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Copyright © 2008 Verisign, Inc.

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