TippingPoint Zero Day Initiative

Apple Webkit Attribute Child Removal Remote Code Execution Vulnerability

ZDI-10-091: June 8th, 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 9853. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute remote code on vulnerable installations of Apple Webkit. User interaction is required in that a target must be coerced into visiting a malicious page.

The specific flaw exists within Webkit's process for destructing attribute objects via the removeChild method. If an attribute's child object is accessed after the attribute was removed from the document, an invalid pointer is referenced. This can be exploited by an attacker to execute remote code under the context of the user running the browser.

Vendor Response

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

Disclosure Timeline

    2010-03-26 - Vulnerability reported to vendor
    2010-06-08 - Coordinated public release of advisory


This vulnerability was discovered by:
    Ralf Philipp Weinmann
    Vincenzo Iozzo