TSRT-06-08: Microsoft Internet Help COM Object Memory Corruption
            Vulnerability

http://www.tippingpoint.com/security/advisories/TSRT-06-08.html
August 8, 2006

-- CVE ID:
CVE-2006-3357

-- Affected Vendor:
Microsoft

-- Affected Products:
Microsoft Windows Server 2003 SP1 and SP2
Microsoft Windows XP SP1 and SP2
Microsoft Windows 2000 Service Pack 4

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability since August 8, 2006 by Digital Vaccine protection
filter ID 4581. For further product information on the TippingPoint IPS:

    http://www.tippingpoint.com 

-- Vulnerability Details:
This vulnerability allows 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.

The specific vulnerability can lead to code execution when
instantiating the Internet.HHCtrl COM object through Internet Explorer.
The flaw exists due to invalid freeing of heap memory when several calls
to the "Image" property of the ActiveX control are performed. By abusing
the jscript.dll CScriptBody::Release() function user supplied data can
be executed.

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

http://www.microsoft.com/technet/security/bulletin/MS06-046.mspx

-- Disclosure Timeline:
2006.04.27 - Vulnerability reported to vendor
2006.08.08 - Digital Vaccine released to TippingPoint customers
2006.08.08 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by Cody Pierce, TippingPoint Security
Research Team.

-- About the TippingPoint Security Research Team (TSRT):
The TippingPoint Security Research Team (TSRT) consists of industry
recognized security researchers that apply their cutting-edge
engineering, reverse engineering and analysis talents in our daily
operations. More information about the team is available at:

    http://www.tippingpoint.com/security
 
The by-product of these efforts fuels the creation of vulnerability
filters that are automatically delivered to our customers' intrusion
prevention systems through the Digital Vaccine(R) service.