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Zero Day Initiative Advisory 10-031

Zero Day Initiative Advisory 10-031
Posted Mar 16, 2010
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 10-031 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable software utilizing Apple's WebKit library. User interaction is required to exploit this vulnerability in that the target must visit a malicious page. The specific flaw exists due to a failure to unregister a callback pointer during the destruction of a particular type of element when embedded inside a 'blink' container. The application dereferences the original resource which can can be leveraged by an attacker to execute arbitrary code under the context of the current user.

tags | advisory, remote, arbitrary
systems | apple
SHA-256 | 978aa1696e69705e418a2ef7e1040dfaa95eb83cc7989e4529645bc9b19e7138

Zero Day Initiative Advisory 10-031

Change Mirror Download
ZDI-10-031: Apple Webkit Blink Event Dangling Pointer Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-031
March 16, 2010

-- 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 9598.
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 software utilizing Apple's WebKit library. User interaction
is required to exploit this vulnerability in that the target must visit
a malicious page.

The specific flaw exists due to a failure to unregister a callback
pointer during the destruction of a particular type of element when
embedded inside a 'blink' container. The application dereferences the
original resource which can can be leveraged by an attacker to execute
arbitrary code under the context of the current user.

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

http://support.apple.com/kb/HT4070

-- Disclosure Timeline:
2009-10-27 - Vulnerability reported to vendor
2010-03-16 - Coordinated public release of advisory

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

Follow the ZDI on Twitter:

http://twitter.com/thezdi
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