bugtraq - ZDI-10-170: Apple Safari Webkit Runin Remote Code Execution Vulnerability

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Message-ID: <EE499D69B3D0714590B6FE9762B0461104BE5570E2@emb01.unity.local>
Date: Mon, 13 Sep 2010 10:56:08 -0500
From: ZDI Disclosures <zdi-disclosures@...pingpoint.com>
To: "Full Disclosure (full-disclosure@...ts.grok.org.uk)" <full-disclosure@...ts.grok.org.uk>,
	"Bugtraq (bugtraq@...urityfocus.com)" <bugtraq@...urityfocus.com>
Subject: ZDI-10-170: Apple Safari Webkit Runin Remote Code Execution
 Vulnerability

ZDI-10-170: Apple Safari Webkit Runin Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-170
September 13, 2010

-- CVE ID:
CVE-2010-1806

-- CVSS:
9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)

-- 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 10462. 
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'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 support of an element
containing the run-in property. When a block box is appended as the
sibling of a run-in box, the run-in box will be promoted to the first
inline box. This implies that the first inline box will be destroyed.
Later when the application attempts to destroy this element, it will
access memory that has been freed. If an attacker can substitute an
alternate type in the element's place, the attacker will have 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/HT4333

-- Disclosure Timeline:
2010-06-17 - Vulnerability reported to vendor
2010-09-13 - 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.

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