TippingPoint Zero Day Initiative

Apple Webkit Option Element ContentEditable Remote Code Execution Vulnerability

ZDI-10-092: 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 9870. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apples Webkit. User interaction is required in that the user must coerced into visiting a website or opening a malicious document.

The specific flaw exists within how the library removes a particular container element containing another element holding the contentEditable attribute. Upon removal of the container during a particular event, the library will traverse the tree and access the contentEditable element that was freed. This can lead to code execution under the context of the application.

Vendor Response

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

Disclosure Timeline

    2010-05-10 - Vulnerability reported to vendor
    2010-06-08 - Coordinated public release of advisory


This vulnerability was discovered by:
    wushi of team509