TippingPoint Zero Day Initiative
 

Microsoft Internet Explorer CMarkup Use-After-Free Remote Code Execution Vulnerability

ZDI-13-029: February 14th, 2013

CVE ID

CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 12759. For further product information on the TippingPoint IPS:

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 handling of CMarkup and CDATA objects. The issue lies in the usage of document.adoptNode on a CDATA object. By manipulating a document's elements an attacker can force a dangling pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute code under the context of the current process.

Vendor Response

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

Disclosure Timeline

    2012-11-09 - Vulnerability reported to vendor
    2013-02-14 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    Stephen Fewer of Harmony Security (www.harmonysecurity.com)