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Multiple Vendor SupportSoft SmartIssue ActiveX Control Buffer Overflow Vulnerability



SupportSoft Inc. develops a product called Self-Service Suite which aims to help end users solve technical problems on their own. Symantec shipped a SupportSoft Inc. ActiveX control along with Norton Internet Security 2006. More information about SupportSoft can be found at http://www.supportsoft.com/ For more information about Symantec and their Norton product line, visit http://www.symantec.com/ and http://www.norton.com/ respectively.


Remote exploitation of a buffer overflow vulnerability in a SupportSoft ActiveX control allows attackers to execute arbitrary code in the context of the current user.

The ActiveX affected control can be identified by the ProgId of "SPRT.SmartIssue" or the CLSID of "01010e00-5e80-11d8-9e86-0007e96c65ae". This ActiveX control is marked safe for scripting as it is intended to be used in a web browser.

When installed with Norton Internet Security (NIS) 2006, the code responsible for implementing the control can be found in "C:Program FilesCommon FilesSymantec Sharedtgctlsi.dll".


Exploitation allows attackers to execute arbitrary code within the context of the current user.

In order to be successful, the attacker must persuade the victim into viewing a maliciously crafted web page. This can easily be accomplished by enticing them into clicking a link via e-mail, an instant messenger, or other means.


iDefense has confirmed the existence of this vulnerability within version 6.9.545.0 of "tgctlsi.dll" as included with Symantec Corp.'s Norton Internet Security 2006. Newer versions of Norton Internet Security do not include this control.

Older versions of this control are suspected to be vulnerable. Other products utilizing this control should be considered vulnerable.


iDefense recommends setting the kill bit for this control to prevent the control from loading when viewing a web page.


Symantec Corp. has addressed this vulnerability in Symantec Security Advisory SYM07-002. You can view their advisory at http://www.symantec.com/avcenter/security/Content/2007.02.22.html

US-CERT has released Vulnerability Note VU#441785 pertaining to this issue as well as related issues within SupportSoft ActiveX controls.

SupportSoft has released updated controls which do not contain the aforementioned vulnerability. To obtain these controls, visit http://www.supportsoft.com/support/controls_update.asp


The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2006-6490 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.


10/18/2006 Initial vendor notification
10/18/2006 Initial vendor response
02/22/2007 Coordinated public disclosure


This vulnerability was reported to iDefense by Peter Vreugdenhil.

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Copyright © 2007 Verisign, Inc.

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