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ZDI-12-194 : Microsoft Internet Explorer OnBeforeDeactivate Event Remote
Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-194
December 21, 2012

- -- CVE ID:
CVE-2012-1878

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

- -- Affected Vendors:
Microsoft

- -- Affected Products:
Microsoft Internet Explorer


- -- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 12388.
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 Microsoft Internet Explorer. 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 Internet Explorer handles the
onbeforedeactivate callback function for certain elements. During the
execution of the onbeforedeactivate callback function it is possible to
alter the DOM tree of the page which can lead to a use-after-free
vulnerability when the function returns. This can result in remote code
execution under the context of the current process.

- -- Vendor Response:
Microsoft has issued an update to correct this vulnerability. More details
can be found at:
  https://technet.microsoft.com/en-us/security/bulletin/ms12-037


- -- Disclosure Timeline:
2012-03-14 - Vulnerability reported to vendor
2012-12-21 - Coordinated public release of advisory

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


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