Vulmon
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Application: IrfanView FlashPix PlugIn Double-Free Vulnerability
Platforms: Windows
Exploitation: Remote code execution
Secunia Number: SA47322
{PRL}: 2011-11
Author: Francis Provencher (Protek Research Lab's)
Website: http://www.protekresearchlab.com/
Twitter: @ProtekResearch
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1) Introduction
2) Timeline
3) Technical details
4) PoC
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1) Introduction
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IrfanView is a freeware/shareware image viewer for Microsoft Windows that can view, edit, and convert image files
and play video/audio files. It is noted for its small size, speed, ease of use, and ability to handle a wide variety of graphic
file formats, and has some image creation and painting capabilities. The software was first released in 1996.
IrfanView is free for non-commercial use; commercial use requires paid registration.
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2) Timeline
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2011-12-08 - Vulnerability reported to vendor
2011-12-20 - Coordinated public release of advisory
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3) Technical details
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The vulnerability is caused due to the "Free_All_Memory()" function not properly setting certain decoder elements to
NULL after freeing them, which can be exploited to cause a double-free condition via specially crafted FPX images.
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4) The Code
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https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/18256.fpx
http://www.protekresearchlab.com/exploits/PRL-2011-11.fpx