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

Hello Matthew,

On Mi, 2009-03-11 at 10:30 -0700, Matthew Dempsky wrote:
> On Wed, Oct 1, 2008 at 5:46 PM, Matthew Dempsky <matthew@xxxxxxxxxxxxxx> 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
> mistaken.

yes, indeed you are right. Both a user and me could repoduce the issue
with the version we mistakenly marked as not vulnerable.

> 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

We have updated that GLSA to no longer reference this issue.

Thank you for the heads-up!


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