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Vulnerability Note VU#234812RDS.Dataspace ActiveX control bypasses ActiveX security modelOverviewThe Microsoft RDS.Dataspace ActiveX control bypasses the ActiveX security model, which can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.I. DescriptionActiveXActiveX is a technology that allows programmers to create reusable software components that can be incorporated into applications to extend their functionality. Internet Explorer is a common Windows application that makes use of ActiveX controls. If you mark your control as safe for initializing, you are asserting that no matter what values are used to initialize your control, it won't do anything that would damage a user's system or compromise the user's security. If you mark your control as safe for scripting, you are asserting that your control won't do anything to damage a user's system or compromise the user's security, regardless of how your control's methods and properties are manipulated by the Web page's script. In other words, it has to accept any method calls (with any parameters) and/or property manipulations in any order without doing anything bad. MDAC is a collection of utilities and routines to process requests between databases and network applications. The RDS component provides an intermediary step for a client's request for service from a back-end database. The component enables the web site to apply business logic to the request. The Problem The RDS.Dataspace ActiveX control includes a method that can create an instance of an ActiveX control that exists on the system. The ActiveX objects created in this manner will bypass the ActiveX security model. In particular, the "safe for scripting" and killbit options are ignored. Note that in default configurations of Internet Explorer, the RDS.Dataspace ActiveX control cannot be loaded in the Internet Zone. Note that exploit code for this vulnerability is publicly available. More information is available in Microsoft Security Bulletin MS06-014. II. ImpactIf a remote attacker can persuade a user to access a specially crafted web page, that attacker may be able to execute arbitrary code with the privileges of the compromised user.III. SolutionApply an UpdateThis issue is addressed in Microsoft Security Bulletin MS06-014.
Disable ActiveX Disabling ActiveX controls in the Internet Zone (or any zone used by an attacker) appears to prevent exploitation of this vulnerability. Instructions for disabling ActiveX in the Internet Zone can be found in the "Securing Your Web Browser" document and the Malicious Web Scripts FAQ. Systems Affected
References
This vulnerability was reported in Microsoft Security Bulletin MS06-014. Microsoft credits Golan Yosef of Finjan's Malicious Code Research Center (MCRC) with providing information regarding this vulnerability. This document was written by Jeff Gennari.
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