From: Alexander Demenshin <aldem-nf@nospam.aldem.net>
To: netfilter@lists.netfilter.org
Subject: Re: strange log
Date: Sun, 4 May 2003 02:35:31 +0200 [thread overview]
Message-ID: <20030504023531.A22082@base.aldem.net> (raw)
In-Reply-To: <1052007023.25877.40.camel@elendil.intranet.cartel-securite.net>; from blancher@cartel-securite.fr on Sun, May 04, 2003 at 02:10:24AM +0200
On Sun, May 04, 2003 at 02:10:24AM +0200, Cedric Blancher wrote:
> DHCP is a very weak system from security point of vue, that can easily
> lead to DoS and traffic redirection.
When you have few hundreths servers, there is no better way to
assign/change IPs. And even without DHCP, there are a lot of ways
for traffic redirection (ARP poisoning and so on).
> A customer server compromise could be a serious threat for other servers...
When server is not managed, or when attacker is inside of hosting segment
- perhaps. But when attacker is outside - there is no way to compromise
the host through DHCP. If it is compromised by other means - DHCP is not the
cause, so? :)
Even MAC filtering is weak - modern NICs may have any MAC, it is configurable.
No system is secure - unless it is plugged off and burned out. And even then...
but this is another story :)
Regards,
/Al
next prev parent reply other threads:[~2003-05-04 0:35 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-02 9:47 strange log Keith Tin
2003-05-03 23:29 ` Cedric Blancher
2003-05-03 23:45 ` Alexander Demenshin
2003-05-04 0:10 ` Cedric Blancher
2003-05-04 0:35 ` Alexander Demenshin [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-04-22 6:50 Emilio Casbas
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