Adobe Flash Player 23.0.0.162 - '.SWF' ConstantPool Critical Memory Corruption

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# Application: Adobe Flash Player

# Platforms: Windows,OSX

# Versions: 23.0.0.162 and earlier

# Author: Francis Provencher of COSIG

# Website: https://cosig.gouv.qc.ca/en/advisory/

# Twitter: @COSIG_

# Date: October 11, 2016

# CVE-2016-4273

# COSIG-2016-35



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1) Introduction

2) Report Timeline

3) Technical details

4) POC



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1) Introduction

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Adobe Flash Player (labeled Shockwave Flash in Internet Explorer and Firefox) is a freeware software for using content created

on the Adobe Flash platform, including viewing multimedia, executing rich Internet applications, and streaming video and audio.

Flash Player can run from a web browser as a browser plug-in or on supported mobile devices.[7] Flash Player was created by Macromedia

and has been developed and distributed by Adobe Systems since Adobe acquired Macromedia.



(https://en.wikipedia.org/wiki/Adobe_Flash_Player)



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2) Rapport de Coordination

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2016-05-17: Francis Provencher of COSIG report this vulnerability to Adobe PSIRT;

2016-05-23: Adobe PSIRT confirm this vulnerability;

2016-10-11: Adobe publish a patch (APSB16-32);

2016-10-11: Advisory released by COSIG;



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3) Technical details

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The vulnerability allows a remote attacker to execute malicious code or access to a part of the dynamically allocated memory using a user interaction

visiting a Web page or open a specially crafted SWF file, an attacker is able to create an “out of bound” memory corruption. A file with an “ActionRecord”

structure that contain an invalid “ConstantPool” could lead to remote code execution in the context of the current user.



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4) POC:

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https://cosig.gouv.qc.ca/wp-content/uploads/2016/10/COSIG-2016-35.zip

https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/40510.zip



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