full-disclosure - Microsoft Internet Explorer SLayoutRun Use After Free

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Message-ID: <511C050E.7060503@security-assessment.com>
Date: Thu, 14 Feb 2013 10:26:38 +1300
From: Scott Bell <scott.bell@...urity-assessment.com>
To: <full-disclosure@...ts.grok.org.uk>
Subject: Microsoft Internet Explorer SLayoutRun Use After
	Free

========================================================================
= Microsoft Internet Explorer SLayoutRun Use After Free
=
= Author: Scott Bell <scott.bell[at]security-assessmemt.com>
=
= Vendor Website: www.microsoft.com
=
= Affected Version: Microsoft Internet Explorer 8
=
= Advisory URL:
http://www.security-assessment.com/files/documents/advisory/ms13_009_ie_slayoutrun_uaf.pdf
=
= Metasploit Module:
http://www.security-assessment.com/files/documents/advisory/ms13_009_ie_slayoutrun_uaf.rb
=
========================================================================

== Description ==

A Use-after-free memory corruption vulnerability was identified in
Microsoft Internet Explorer 8. This allows a malicious user to remotely
execute arbitrary code on a vulnerable user’s machine, in the context of
the current user. The memory corruption happens when the application of
a style sheet performs style computations on the DOM. A CParaElement
node is released but a reference is still kept in CDoc. This memory is
reused when a CDoc relayout is performed.

== Solution ==

Microsoft validated this security issue in Internet Explorer 8 and
issued a patch (MS13-009) to remedy it. Security-Assessment.com
recommends applying the patch which has been made available via Windows
Update.

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