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From: "Maciej Żenczykowski" <zenczykowski@gmail.com>
To: Linux NetDev <netdev@vger.kernel.org>
Subject: IP_TRANSPARENT requires CAP_NET_ADMIN - why?
Date: Tue, 30 Aug 2011 14:45:54 -0700	[thread overview]
Message-ID: <CAHo-Ooz-0wt4-3oXZBeEmLTSom5qUxhXhP4MDUrSz322OTGa9A@mail.gmail.com> (raw)

Hi,

I'm curious why transparent sockets [setsockopt(IP{,V6}_TRANSPARENT),
ie. inet_sk(sk)->transparent bit] require CAP_NET_ADMIN privileges.

Wouldn't CAP_NET_RAW be more appropriate?

Looks to me like CAP_NET_RAW is all about raw sockets.
Transparent sockets are dangerous because they effectively allow spoofing.
But this seems to be the same sort of thing that CAP_NET_RAW protects
against.

Is there something I'm missing?
Is there any reason why having CAP_NET_RAW privs shouldn't allow one
to set the transparent bit on a socket?

Would people be opposed to relaxing the check on setting sk->transparent
to be either CAP_NET_ADMIN or CAP_NET_RAW?

Thanks,
Maciej

             reply	other threads:[~2011-08-30 21:45 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-08-30 21:45 Maciej Żenczykowski [this message]
2011-09-01 21:25 ` IP_TRANSPARENT requires CAP_NET_ADMIN - why? Maciej Żenczykowski
2011-09-02  8:43   ` Balazs Scheidler
2011-09-02 19:10     ` [PATCH] net: change capability used by socket options IP{,V6}_TRANSPARENT Maciej Żenczykowski
2011-09-13  5:55       ` Maciej Żenczykowski
2011-09-13 15:27       ` Balazs Scheidler
2011-09-14  6:45         ` Maciej Żenczykowski
2011-09-20 19:42         ` David Miller
2011-10-17 22:16           ` Maciej Żenczykowski
2011-10-17 22:19             ` Maciej Żenczykowski
2011-10-19 23:34             ` David Miller
2011-10-20  3:32               ` Maciej Żenczykowski
2011-10-20  4:19                 ` David Miller
2011-10-20  4:31                   ` Maciej Żenczykowski
2011-10-20  4:34                     ` David Miller
2011-10-20 22:10                       ` [PATCH] net: allow CAP_NET_RAW to set " Maciej Żenczykowski
2011-10-20 22:22                         ` David Miller
2011-09-22 23:29         ` [PATCH] net: change capability used by " Maciej Żenczykowski
2011-09-23 14:45           ` Serge E. Hallyn
2011-09-23 16:36           ` Casey Schaufler
2011-09-23 19:33             ` Maciej Żenczykowski
2011-09-26 16:31               ` Casey Schaufler

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