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Zero Day Initiative Advisory 11-101

Zero Day Initiative Advisory 11-101
Posted Mar 3, 2011
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 11-101 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple's iPhone Webkit library. 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 way the library implements the .sort function for an array. The library will trust the implementation of a particular method which when executed can be used to manipulate elements out from underneath it. This can lead to code execution under the context of the application.

tags | advisory, remote, arbitrary, code execution
systems | apple, iphone
advisories | CVE-2011-0154
MD5 | 388a7371469e84f404d9597c81737774

Zero Day Initiative Advisory 11-101

Change Mirror Download
ZDI-11-101: Apple iPhone Webkit Library Javascript Array sort Method Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-101

March 2, 2011

-- CVE ID:
CVE-2011-0154

-- 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 10849.
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 iPhone Webkit library. 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 way the library implements the .sort
function for an array. The library will trust the implementation of a
particular method which when executed can be used to manipulate elements
out from underneath it. 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/HT4554

-- Disclosure Timeline:
2010-09-29 - Vulnerability reported to vendor
2011-03-02 - Coordinated public release of advisory

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

-- 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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