XnView ECW Image Processing Heap Overflow

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Application:   XnView ECW Image Processing Heap Overflow
Platforms:   Windows

Secunia:   SA49091 

{PRL}:   2012-13

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) The Code

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1) Introduction
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XnView is a cross-platform image viewer used for viewing, converting, organising and editing graphical & video files.
It is free of charge for private, educational and non-profit organisations. For commercial use and distribution,
the user must register the program. It is popular with users as it provides features normally found only
in commercial image viewers.

(http://en.wikipedia.org/wiki/XnView)

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2) Report Timeline
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2012-05-15  Vulnerability reported to Secunia
2012-06-15  Vendor disclose patch

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3) Technical details
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A boundary error in the NCSEcw.dll module when decompressing Enhanced
Compressed Wavelet images can be exploited to cause a heap-based buffer
overflow via a specially crafted ECW file.

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4) The Code
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http://www.protekresearchlab.com/exploits/PRL-2012-13.ecw
http://www.exploit-db.com/sploits/19182.ecw