ZDI-10-092: Apple Webkit Option Element ContentEditable Remote Code Execution Vulnerability

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ZDI-10-092: Apple Webkit Option Element ContentEditable Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-092
June 8, 2010

-- CVE ID:
CVE-2010-1396

-- 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 9870. 
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 Apples Webkit. User interaction is required
in that the user must coerced into visiting a website or opening a
malicious document.

The specific flaw exists within how the library removes a particular
container element containing another element holding the contentEditable
attribute. Upon removal of the container during a particular event, the
library will traverse the tree and access the contentEditable element
that was freed. This 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:
2010-05-10 - 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):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents 
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

    http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:

    http://www.zerodayinitiative.com/advisories/disclosure_policy/

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