TippingPoint Zero Day Initiative

Microsoft Internet Explorer DXImageTransform ActiveX Memory Corruption Vulnerability

ZDI-06-018: June 13th, 2006


Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 4461. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Internet Explorer. Successful exploitation requires that the target user browse to a malicious web page.

The specific flaw exists in the Microsoft ActiveX object DXImageTransform.Microsoft.MMSpecialEffect1Input. Due to improper garbage collection when another object is assigned to any property, code execution is possible. This object implements the IObjectSafety interface and thus the default Internet Explorer settings allow for arbitrary code execution without any further user interaction.

Several related ActiveX objects suffer from the same problem including:

* DXImageTransform.Microsoft.MMSpecialEffect1Input.1
* DXImageTransform.Microsoft.MMSpecialEffect2Inputs
* DXImageTransform.Microsoft.MMSpecialEffect2Inputs.1
* DXImageTransform.Microsoft.MMSpecialEffectInplace1Input
* DXImageTransform.Microsoft.MMSpecialEffectInplace1Input.1

Vendor Response

Microsoft has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2006-04-27 - Vulnerability reported to vendor
    2006-06-13 - Coordinated public release of advisory


This vulnerability was discovered by: