#####################################################################################

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


#####################################################################################

1) Introduction
2) Report Timeline
3) Technical details
4) The Code


#####################################################################################

===============
1) Introduction
===============

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)

#####################################################################################

============================
2) Report Timeline
============================

2012-05-15  Vulnerability reported to Secunia
2012-06-15  Vendor disclose patch


#####################################################################################

============================
3) Technical details
============================

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.

The vulnerabilities are confirmed in version 1.98.8. Other versions may also be affected

#####################################################################################

===========
4) The Code
===========

Here

######################################################################################