ZDI-10-095: Apple Webkit DOCUMENT_POSITION_DISCONNECTED Attribute Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-095
June 8, 2010

-- CVE ID:
CVE-2010-1397

-- Affected Vendors:
Apple

-- Affected Products:
Apple WebKit

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 9332. 
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
software utilizing a vulnerable version of Apple's Webkit. User
interaction is required to exploit this vulnerability in that the target
must visit a malicious page.

The specific flaw exists within the way that Apple's Webkit handles the
DOCUMENT_POSITION_DISCONNECTED attribute when a container is removed.
This attribute is responsible for ensuring that a node is disconnected
from it's container and is implementation specific regarding the order
of each node. If the disconnected element is removed from a particular
type of container, the next time the application attempts to reference
that container, the application will access memory that has been free
which 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:

http://support.apple.com/kb/HT4196

-- Disclosure Timeline:
2009-12-04 - Vulnerability reported to vendor
2010-06-08 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * wushi&Z of team509

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