Firewall-1

Re: [FW-1] Asn.1 vulnerabilty without aggresive mode

Subject: Re: [FW-1] Asn.1 vulnerabilty without aggresive mode
From: Joachim Bassmann <jb AT HARIBO.S.BAWUE DOT DE>
To: FW-1-MAILINGLIST AT AMADEUS.US.CHECKPOINT DOT COM
Date: Thu, 29 Jul 2004 15:59:42 +0200
Hi Jochen,

--On Donnerstag, 29. Juli 2004 13:48 +0200 Jochen Vogel <jvogel AT IT-SEC DOT 
DE>
wrote:

Is there any vulnerability if i doesn´t use aggresive mode?

My interpretation is "YES" - but I'm also not sure about this.

The difference is that you need to have a "real communication". The
one-packet attack with aggressive mode is also possible with spoofed source
addresses because you don't need any reply from the FW to arrive at your
end.

regards

Joachim Bassmann, DELOS AG, Stuttgart, Germany
------------------------------------------------------------
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und das Internet geschlossen ist, werdet Ihr merken, daß Ihr Eure Kinder
doch erziehen müsst. - ChaosWarrior AT AreaDVD DOT de

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