bugtraq - ZDI-10-096: Apple Webkit Recursive Use Element Remote Code Execution Vulnerability

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Message-ID: <EE499D69B3D0714590B6FE9762B0461104BD3C36A8@emb01.unity.local>
Date: Tue, 8 Jun 2010 11:34:09 -0500
From: ZDI Disclosures <zdi-disclosures@...pingpoint.com>
To: "'full-disclosure@...ts.grok.org.uk'" <full-disclosure@...ts.grok.org.uk>,
	"'bugtraq@...urityfocus.com'" <bugtraq@...urityfocus.com>
Subject: ZDI-10-096: Apple Webkit Recursive Use Element Remote Code
 Execution Vulnerability

ZDI-10-096: Apple Webkit Recursive Use Element Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-096
June 8, 2010

-- CVE ID:
CVE-2010-1404

-- 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 9849. 
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'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 how the WebKit library handles
recursively defined Use elements. Upon expanding the target of the use
element within the tree, the application will create a dual-reference of
a Use element. Upon page deconstruction the application will destroy the
single reference and then attempt to destroy the second one that is
currently occupying the recently freed memory. Successful exploitation
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:
2010-02-23 - Vulnerability reported to vendor
2010-06-08 - Coordinated public release of advisory

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

-- About the Zero Day Initiative (ZDI):
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disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
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