Re: SSL and TCP RST/SYN attack

[Fabien Vincent <fabvincent () gmail com>]

Hi David,

It seems that you're not understand the fact that TCP (OSI Layer 4) is
under SSL (OSI Layers 6-7)

If you block TCP connection with RST packet, that the same result for
HTTP or HTTPS or any protocol over TCP, the connexion will be closed
on RST receiver ... so this cannot be an SSL vulnerability !

Rgds,

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FV

On Sun, Sep 20, 2009 at 18:29, David Zhang <david.zhang1965 () gmail com> wrote:
> Hi all:
> I would like to ask a question about SSL. Consider the situation that
> a man in the middle. Because he can always fake TCP RST/SYN packet, so
> he can always block the client to get service from the https server.
>
> So can I say that this is an intrinsic vulnerable in SSL, as
> considering the situation that the attacker is in the same LAN with
> the client, the attacker can always block the client to reach his
> server (say on-line banking)?
>
> Thanks
> David
>
> ------------------------------------------------------------------------
> Securing Apache Web Server with thawte Digital Certificate
> In this guide we examine the importance of Apache-SSL and who needs an SSL certificate.  We look at how SSL works, 
> how it benefits your company and how your customers can tell if a site is secure. You will find out how to test, 
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> certificates.
>
> http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1
> ------------------------------------------------------------------------

------------------------------------------------------------------------
Securing Apache Web Server with thawte Digital Certificate
In this guide we examine the importance of Apache-SSL and who needs an SSL certificate.  We look at how SSL works, how 
it benefits your company and how your customers can tell if a site is secure. You will find out how to test, purchase, 
install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for set-up are 
highlighted to help you ensure efficient ongoing management of your encryption keys and digital certificates.

http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1
------------------------------------------------------------------------