Re: Possible security hole

From: Warren Barrow (wbarrowat_private)
Date: Mon Mar 29 1999 - 10:11:11 PST

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    it is quite possible that -any- firewall may be incorrectly configured.. I
    would have to say that a good portion of firewalls are running in
    production mode with incorrect configurations. If you read -further- into
    the FW-1 documentation it states that it is highly advisable to enable
    "control ip forwarding at boot".  ..with this option enabled, fw-1 will
    make sure the interface does not come up until the security policy is
    loaded and in place.
    
    If you are running firewall-1 v3.0b, it is time to upgrade... 4.0 is out
    and has many a fix added.
    
    -Warren Barrow/CCSE
    
    
    
    At 08:09 AM 3/29/99 -0300, you wrote:
    >Quoting Christoforos Karatzinis <chkaat_private>:
    >
    >Hi,
    >     The FW1 documentation clearly states that there is
    >a small delay after the interface initialize's and the
    >FW starts acting on it.  It is possible to do something
    >"bad" to it in this period...
    >
    >Regards,
    >Cristiano Lincoln Mattos
    >Recife / Brazil
    >
    >> The first 25 packets were lost before the interface's
    >initialization. The
    >> packets with sequence number greater than 34 are droped
    >from the firewall.
    >> What about the packets with sequence number 25-34? Is it
    >possible that
    >> someone can use this time (after the interface's
    >initialization and before
    >> the firewall's initialization) to do something bad?
    >>
    >> Regards,
    >> Christofer
    >
    >
    



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