linux-kernel - Re: [RFC] ipv4: add ICMP socket kind

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <AANLkTikS6rs-AFGmtTfuRdELJ5+y=o4g1i0Xk9KDFRiv@mail.gmail.com>
Date:	Tue, 21 Dec 2010 13:46:41 -0500
From:	Colin Walters <walters@...bum.org>
To:	Vasiliy Kulikov <segooon@...il.com>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Pavel Kankovsky <peak@...o.troja.mff.cuni.cz>,
	Solar Designer <solar@...nwall.com>
Subject: Re: [RFC] ipv4: add ICMP socket kind

On Tue, Dec 21, 2010 at 1:18 PM, Vasiliy Kulikov <segooon@...il.com> wrote:
> Hi,
>
> This patch adds IPPROTO_ICMP socket kind.  It makes it possible to send
> ICMP_ECHO messages and receive corresponding ICMP_ECHOREPLY messages
> without any special privileges.  In other words, the patch makes it
> possible to implement setuid-less /bin/ping.
>
> A new ping socket is created with
>
>    socket(PF_INET, SOCK_DGRAM, IPPROTO_ICMP)

And the default is to allow any uid to do this (modulo LSM)?

If you really have a burning desire to get rid of setuid /bin/ping,
why not just do it in userspace via message passing to/from a
privileged process, and avoid a lot of code in the kernel?  It's much
more flexible.  You could, for example, limit it to once a second by
default, allow only one process doing this per uid, etc.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/