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Computer Associates eTrust Intrusion Detection CallCode ActiveX Control Code Execution Vulnerability



Computer Associates eTrust Intrusion Detection is a network intrusion management and prevention system, that includes real-time session monitoring and Internet web filtering capabilities. More information can be found on the vendor's site at the following URL.



Remote exploitation of a design error vulnerability in Computer Associates International Inc.'s (CA) eTrust Intrusion Detection allows attackers to execute arbitrary code.

When eTrust Intrusion Detection is installed it registers the following ActiveX control as safe for scripting:

 File: Caller.dll Clsid: 41266C21-18D8-414B-88C0-8DCA6C25CEA0 

This control contains a series of scriptable functions which allow malicious web pages to load arbitrary DLLs and call their exports with controlled parameters.


Exploitation allows an attacker to execute code with the privileges of the currently logged on user. The user would have to be lured into visiting a malicious web page.


iDefense has confirmed that CA eTrust Intrusion Detection version 3.0.5 on Windows is vulnerable. The file version of caller.dll tested was


Setting the kill-bit for this control will prevent it from being loaded within Internet Explorer.


Computer Associates has addressed this vulnerability by releasing an update. More information can be found from their advisory at the following URL.



The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-3302 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.


06/20/2007 Initial vendor notification
06/20/2007 Initial vendor response
07/24/2007 Coordinated public disclosure


This vulnerability was reported to iDefense by Sebastian Apelt.

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Copyright © 2007 Verisign, Inc.

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