ZDI-11-097: Apple Webkit setOuterText Memory Corruption Remote Code Execution Vulnerability

ZDI-11-097: Apple Webkit setOuterText Memory Corruption Remote Code Execution
Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-097

March 2, 2011

– CVE ID:
CVE-2011-0116

– 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 10858.
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 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 setOuterText method of the Webkit
htmlelement library. Due to a failure to properly track DOM
manipulations made within the browser, it is possible to make use of a
previously freed pointer and facilitate remote code execution under the
context of the user running the browser process.

– 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:
2010-12-21 - Vulnerability reported to vendor
2011-03-02 - Coordinated public release of advisory

– Credit:
This vulnerability was discovered by:
* Anonymous

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