From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: pausmith@nortelnetworks.com (Paul D. Smith)
Cc: linux-kernel@vger.kernel.org
Subject: Re: SO_REUSEADDR redux
Date: Thu, 1 Feb 2001 22:39:37 +0000 (GMT) [thread overview]
Message-ID: <E14OSOC-0005FD-00@the-village.bc.nu> (raw)
In-Reply-To: <14969.57896.331183.374489@lemming.engeast.baynetworks.com> from "Paul D. Smith" at Feb 01, 2001 05:24:40 PM
> This application uses SO_REUSEADDR in conjunction with INADDR_ANY. What
> it does is bind() to INADDR_ANY, then listen(). Then, it proceeds to
> bind (but _not_ listen) various other specific addresses.
That should be ok if its setting SO_REUSEADDR
> not a security problem: what's really the problem is having two
> _listens_. As long as you're only listening on the one, I don't see how
> connections/packets could be stolen.
UDP.
In fact the classic exploit consisted of binding to port 2049 witha specific
connect address set on UDP and stealing NFS packets..
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next prev parent reply other threads:[~2001-02-01 23:17 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-02-01 22:24 Paul D. Smith
2001-02-01 22:39 ` Alan Cox [this message]
2001-02-02 2:18 ` David S. Miller
2001-02-02 5:46 ` David S. Miller
2001-02-02 2:02 ` Paul D. Smith
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