On Thu, 5 Sep 2002, Williams, Kevin wrote:

> > -----Original Message-----
> > From: Davide Libenzi [mailto:[EMAIL PROTECTED]]
> > Sent: Thursday, September 05, 2002 10:33 AM
> > To: XMail mailing list
> > Subject: [xmail] Re: greeting banner
> >
> >
> > ok, we have two different scenarios here :
>
> Some would say three scenarios
>
> >
> > 1) someone is explicitly attacking you ( your IP )
> >
> > 2) someone is scanning open ports and trying exploits over them
>
> 3) some script kiddie read about a specific exploit on IRC or in a
> newsgroup and is searching for a system to try it on

This is case 2) actually. Why it is so difficult to understand that hiding
banners doesn't help ?!? Actually, I would say that is even worse. Let's
say that I'm the "script kiddie" you're talking about and I've found an
exploit for XMail <= 1.8 ... and suppose that XMail is one of those smart
MTA that implement the high-security feature of stealth-banner. Now I can
get either :

220 I'm XMail 1.6

or :

220 stealth mode active

What kind of difference should make in my mind these two responses. I tell
you what ... by exlicitly saying "I'm XMail" you at least will avoid to be
shot with sendmail, exim, postfix,... exploits.




- Davide


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