n.runs-SA-2008.008 - Internet Explorer HTML Object Memory Corruption and Remote Code Execution

["security () nruns com" <security () nruns com>]

n.runs AG
http://www.nruns.com/                              security(at)nruns.com
n.runs-SA-2008.008                                       21-October-2008

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Vendor:             Microsoft
Affected Products:  Internet Explorer 6
                    Internet Explorer 7
                    Windows XP SP2 & SP3
                    Windows 2000 SP4
                    Windows 2003 SP1
Vulnerability:      Remote Code execution
Risk:               High
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Overview
--------
A remote code execution vulnerability exists in Internet Explorer due to 
accesses to uninitialized memory in certain cases of DTML constructs. As 
a result, memory may be corrupted in such a way that an attacker could 
execute arbitrary code in the context of the logged-on user.

Impact
------
An attacker could exploit the vulnerability by constructing a specially 
prepared Website, when a user views the Web page, the vulnerability 
could allow remote code execution. An attacker who successfully 
exploited this vulnerability could gain the same user rights as the 
logged-on user.

Solution
--------
Microsoft has issued an update to correct this vulnerability. More 
details can be found at:
http://www.microsoft.com/technet/security/bulletin/MS08-058.mspx

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Vendor communication:

   2008/07/07   Thierry sends notification to Microsoft
   2008/07/07   Acknowledgement and Receipt
   2008/10/14   Microsoft publishes

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Credits
-------
Vulnerability discovered by Thierry Zoller


About n.runs
------------
n.runs AG is a vendor-independent consulting company specializing in the
areas of: IT Infrastructure, IT Security and IT Business Consulting. In
2007, n.runs expanded its core business area, which until then had  been
project based consulting, to  include the development of high-end 
security solutions. Application Protection System - Anti Virus (aps-AV) 
is the first high-end security solution that n.runs is bringing to the 
market.

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