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ZDI-11-289 : Microsoft Internet Explorer swapNode Handling Remote Code
Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-11-289
October 15, 2011

- -- CVE ID:
CVE-2011-2000

- -- 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 11760.
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 calls
to the method swapNode(). When a call to swapNode is issued on an node
within a document that has two body nodes, Internet Explorer frees an
attribute field for one of the body nodes and then later re-uses the
freed field during the node swap. This behavior could result in remote
code execution under the context of the current user.

- -- Vendor Response:

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

http://technet.microsoft.com/en-us/security/bulletin/ms11-081



- -- Disclosure Timeline:
2011-07-20 - Vulnerability reported to vendor
2011-10-15 - Coordinated public release of advisory

- -- Credit:
This vulnerability was discovered by:

* Sebastian Apelt (www.siberas.de)



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