Vulnerability Note VU#813588

Microsoft DirectAnimation Path ActiveX control Spline method integer overflow

Overview

A vulnerability in the Microsoft DirectAnimation ActiveX controls may allow a remote attacker to execute arbitrary code on an affected system.

I. Description

Microsoft's DirectAnimation is a suite of development functionality, predating Microsoft DirectX, that provides animation support for Web applications and other software. This suite includes a number of COM objects and is provided by default with a number of versions of the Windows operating system.

An integer overflow vulnerability exists in the way the DirectAnimation.PathControl COM object (daxctle.ocx) handles an overly large argument supplied to the Spline method. This vulnerability could cause an invalid memory write, allowing a remote attacker to execute arbitrary code or cause a denial of service.

II. Impact

By convincing a user to view a specially crafted HTML document (e.g., a web page or an HTML email message or attachment), a remote unauthenticated attacker may be able to execute arbitrary code with the privileges of the user. The attacker could also cause Internet Explorer (or the program using the WebBrowser control) to crash.

III. Solution

Apply a patch from the vendor

Microsoft has published Microsoft Security Bulletin MS06-067 in response to this issue. Users are encouraged to review this bulletin and apply the patches it refers to.

Workarounds

In addition to the patches referred to above, Microsoft Security Bulletin MS06-067 also contains a number of workarounds for this issue. Users, particularly those who are unable to apply the patches are encouraged to implement these workarounds.

Systems Affected

Vendor	Status	Date Updated
Microsoft Corporation	Vulnerable	14-Nov-2006

References

http://www.xsec.org/index.php?module=releases&act=view&type=1&id=19
http://www.securityfocus.com/archive/1/archive/1/444504/100/0/threaded
http://www.xsec.org/index.php?module=releases&act=view&type=1&id=19
http://securitytracker.com/id?1016764
http://xforce.iss.net/xforce/xfdb/28608
http://www.microsoft.com/technet/security/bulletin/ms06-067.mspx

Credit

This vulnerability was publicly reported by nop of XSec.

This document was written by Chad Dougherty based on information supplied by Microsoft.

Other Information

Date Public	08/28/2006
Date First Published	11/14/2006 04:16:58 PM
Date Last Updated	11/14/2006
CERT Advisory
CVE Name	CVE-2006-4446
US-CERT Technical Alerts
Metric	50.87
Document Revision	9

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Produced 2006 by US-CERT, a government organization
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