TippingPoint Zero Day Initiative

Apple Webkit Blink Event Dangling Pointer Remote Code Execution Vulnerability

ZDI-10-031: March 16th, 2010


CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 9598. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable software utilizing Apple's WebKit library. User interaction is required to exploit this vulnerability in that the target must visit a malicious page.

The specific flaw exists due to a failure to unregister a callback pointer during the destruction of a particular type of element when embedded inside a 'blink' container. The application dereferences the original resource which can can be leveraged by an attacker to execute arbitrary code under the context of the current user.

Vendor Response

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

Disclosure Timeline

    2009-10-27 - Vulnerability reported to vendor
    2010-03-16 - Coordinated public release of advisory


This vulnerability was discovered by:
    wushi&Z of team509