Advisory Details

December 21st, 2012

Webkit HTMLMedia Element beforeLoad Remote Code Execution Vulnerability

CVE ID	CVE-2011-3071
CVSS SCORE	7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	WebKit.Org
AFFECTED PRODUCTS	WebKit
TREND MICRO CUSTOMER PROTECTION	Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['12492']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS	This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple Safari 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 implementation of a HTMLMedia element. After a source element is created, an attacker can catch the beforeLoad event before the element is used, and delete the element. The pointer to the source element will then be referenced causing a use-after-free condition, which can lead to code execution under the context of the application.
ADDITIONAL DETAILS	WebKit.Org has issued an update to correct this vulnerability. More details can be found at: http://support.apple.com/kb/HT1222
DISCLOSURE TIMELINE	2012-03-14 - Vulnerability reported to vendor 2012-12-21 - Coordinated public release of advisory
CREDIT	pa_kt / twitter.com/pa_kt

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