TippingPoint Zero Day Initiative

Microsoft Internet Explorer CSS Float Property Memory Corruption Vulnerability

ZDI-06-041: November 14th, 2006


Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 4761. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows attackers to execute arbitrary code on vulnerable installations of Microsoft Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page.

The specific vulnerability exists due to improper parsing of HTML CSS 'float' properties. By ordering specially crafted 'div' tags in a web page, memory corruption can occur leading to remote code execution.

Vendor Response

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

Disclosure Timeline

    2006-07-18 - Vulnerability reported to vendor
    2006-11-14 - Coordinated public release of advisory


This vulnerability was discovered by:
    Sam Thomas