ZDI-11-289 : Microsoft Internet Explorer swapNode Handling Remote Code,Execution Vulnerability

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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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