TippingPoint Zero Day Initiative

Apple Webkit SVG Floating Text Element Remote Code Execution Vulnerability

ZDI-10-153: August 11th, 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 10147. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple Safari's Webkit. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the library's process for handling floating elements within an SVG document. During layout of the element, the application will mismanage references to the floating element. Later the application will attempt to destroy this reference triggering corruption. Successful exploitation can lead to code execution under the context of the application.

Vendor Response

Apple states:

Fixed in Safari 5.0.1: http://support.apple.com/kb/HT4276

Disclosure Timeline

    2010-06-01 - Vulnerability reported to vendor
    2010-08-11 - Coordinated public release of advisory


This vulnerability was discovered by:
    wushi of team509