Microsoft Internet Explorer 8 mshtml!CTreeNode List Element Use-after-Free Vulnerability
Internet Explorer (IE) is a graphical Web browser developed by Microsoft Corp. that has been included with Microsoft Windows since 1995. For more information about Internet Explorer, please the visit following website:
Remote exploitation of a use-after-free vulnerability in multiple versions of Microsoft Corp.'s Internet Explorer could allow an attacker to execute arbitrary code with the privileges of the current user.
A use-after-free vulnerability exists in the way Internet Explorer handles stylized CSS on list elements within HTML documents. Specifically, the issue occurs within how the mshtml!CTreeNode object handles list-stylized elements.
Exploitation of this issue allows an attacker to execute arbitrary code with the privileges of the current user. An attacker would need to entice a victim to visit a specially crafted Web page. Upon visiting the page, exploitation would occur and execution of arbitrary code would be possible.
Internet Explorer 8 and 9 are vulnerable.
- Utilize EMET
- Set Internet and Local intranet security zone settings to "High" to block ActiveX Controls and Active Scripting in these zones
- Configure Internet Explorer to prompt before running Active Scripting or to disable Active Scripting in the Internet and local intranet security zone
Microsoft has released a fix which addresses this issue. For more information, consult their advisory at the following URL:
The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2013-0811 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.
02/21/2013 Initial Vendor Notification
02/21/2013 Initial Vendor Reply
05/14/2013 Coordinated Public Disclosure
This vulnerability was reported to iDefense by Jose A. Vazquez of Yenteasy - Security Research.
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