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zdiStephen Fewer of Harmony Security (www.harmonysecurity.com)ZDI-13-029
HistoryFeb 14, 2013 - 12:00 a.m.

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

2013-02-1400:00:00
Stephen Fewer of Harmony Security (www.harmonysecurity.com)
www.zerodayinitiative.com
10

0.879 High

EPSS

Percentile

98.7%

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.