Re: [fw-wiz] OBSD reaction to CERT advisory

From: Darren Reed (
Date: 10/09/02

From: Darren Reed <>
To: Daniel Hartmeier <>
Date: Wed Oct  9 20:37:17 2002

In some email I received from Daniel Hartmeier, sie wrote:
> And, yes, based solely on code inspection, I'm very confident that
> IPFilter is vulnerable to this attack.

Note, this statement: "code inspection". Not a code walk through or
even an actual test.

> If anyone fancies a little
> competition, set up an ftp server behind an IPFilter firewall. Allow me
> to connect to the ftp server (using passive mode, so the in-kernel ftp
> proxy allows incoming ftp data connections). Setup a fake target, like
> an echo "secret" inetd.conf entry, and absolutely filter any access to
> that port on the firewall. If I can connect to that port and get the
> secret, I win. How much are you betting?

How much are you prepared to lose ?