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Zero Day Initiative Advisory 12-055

Zero Day Initiative Advisory 12-055
Posted Apr 10, 2012
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 12-055 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of WebKit. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The flaw exists within the WebCore component as used by WebKit. Specifically within the handling of element properties. When importing a node having a nonattribute property such as an attached event, an object is improperly freed and accessed. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the browser.

tags | advisory, remote, arbitrary
advisories | CVE-2011-3928
SHA-256 | d921ddf2635cdab4f6571381dd2e3b6fa6a4467d1396858dff4d080edc7e7e80

Zero Day Initiative Advisory 12-055

Change Mirror Download

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ZDI-12-055 : Webkit.org Webkit copyNonAttributeProperties Remote Code
Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-12-055

April 9, 2012

- -- CVE ID:
CVE-2011-3928

- -- CVSS:
7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P

- -- Affected Vendors:

WebKit.Org



- -- Affected Products:

WebKit.Org WebKit



- -- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of WebKit.
User interaction is required to exploit this vulnerability in that the
target must visit a malicious page or open a malicious file.

The flaw exists within the WebCore component as used by WebKit.
Specifically within the handling of element properties. When importing a
node having a nonattribute property such as an attached event, an object
is improperly freed and accessed. A remote attacker can exploit this
vulnerability to execute arbitrary code under the context of the browser.

- -- Vendor Response:

WebKit.Org has issued an update to correct this vulnerability. More
details can be found at:

http://prod.lists.apple.com/archives/security-announce/2012/Mar/msg00003.html




- -- Disclosure Timeline:
2011-12-22 - Vulnerability reported to vendor

2012-04-09 - 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/

Follow the ZDI on Twitter:

http://twitter.com/thezdi
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