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Re: Adobe Flash Player plug-in null pointer dereference and browser crash

From: Matthew Dempsky (matthewmochimedia.com)
Date: Wed Mar 11 2009 - 12:30:49 CDT

On Wed, Oct 1, 2008 at 5:46 PM, Matthew Dempsky <matthewmochimedia.com> wrote:
> If a Flash 9 SWF loads two SWF files with different SWF version
> numbers from two distinct HTTP requests to the exact same URL
> (including query string arguments), then Adobe's Flash Player plug-in
> will try to dereference a null pointer.  This issue affects at least
> versions,,, and on Windows, OS
> X, and Linux.

As an update, this issue also affects at least on Windows
and OS X. I've seen some Linux distributions (e.g., [1]) claim that fixes this bug (aka CVE-2008-4546), but I think this is

You can easily reproduce this bug (i.e., crash your browser) by
visiting http://flashcrash.dempsky.org/. Be sure to tell your
friends: it can be the next Rick Roll.

[1] http://www.gentoo.org/security/en/glsa/glsa-200903-23.xml?style=printable

Matthew Dempsky