TippingPoint Zero Day Initiative
 

Microsoft Internet Explorer CSS Behavior Memory Corruption Vulnerability

ZDI-09-048: August 5th, 2009

CVE ID

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 8359, 8361. 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. User interaction is required to exploit this vulnerability in that the target must visit a malicious page.

The specific flaw exists when accessing embedded style sheets within an HTML file. When modifying the properties of rules defined in the style the behavior element is improperly processed resulting in a memory corruption which can be further leveraged to execute arbitrary code 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

    2009-04-28 - Vulnerability reported to vendor
    2009-08-05 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    Peter Vreugdenhil