TippingPoint Zero Day Initiative

Microsoft Internet Explorer DOM Object substringData() Heap Overflow Vulnerability

ZDI-08-039: June 10th, 2008


Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 6155. For further product information on the TippingPoint IPS:

Vulnerability Details

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

The specific flaw exists in the substringData() method when called on a DOM object that has been manipulated in a special way. The attack results in an exploitable heap buffer allowing for code execution under the context of the current user.

Vendor Response

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

Disclosure Timeline

    2008-02-07 - Vulnerability reported to vendor
    2008-06-10 - Coordinated public release of advisory


This vulnerability was discovered by:
    Peter Vreugdenhil
    Sebastian Apelt (webmaster@buzzworld.org)