Message-ID: <OF1E7B3855.9EE01BF7-ON88257491.00755FBF-86257491.0075C832@3com.com>
Date: Fri, 25 Jul 2008 16:26:30 -0500
From: zdi-disclosures@...m.com
To: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Cc: zdi-disclosures@...m.com
Subject: ZDI-08-045: Apple Safari StyleSheet ownerNode Heap Corruption Vulnerability

ZDI-08-045: Apple Safari StyleSheet ownerNode Heap Corruption 
Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-08-045
July 25, 2008

-- CVE ID:
CVE-2008-2317

-- Affected Vendors:
Apple

-- Affected Products:
Apple Safari

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 6146. 
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
vulnerable installations of Apple Safari. User interaction is required
to exploit this vulnerability in that the target must visit a malicious
page.

The specific flaw exists in the garbage collection of JavaScript
document elements in WebCore. When a CSSStyleSheet object of a style
element is copied, and the style element is deallocated, a reference to
the ownerNode property of the copied CSSStyleSheet object will result in
a heap corruption allowing for the execution of arbitrary code.

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

http://support.apple.com/kb/HT2351

-- Disclosure Timeline:
2008-05-13 - Vulnerability reported to vendor
2008-07-25 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Anonymous

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