From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Philip Whineray <phil@firehol.org>
Cc: Jan Engelhardt <jengelh@inai.de>,
netfilter-devel@vger.kernel.org,
"Eric W. Biederman" <ebiederm@xmission.com>
Subject: Re: [PATCH v3] Set /proc/net entries owner to root in namespace
Date: Wed, 25 Nov 2015 13:55:08 +0100 [thread overview]
Message-ID: <20151125125508.GA27599@salvia> (raw)
In-Reply-To: <20151122113507.GA5560@compaq.slightly-cracked.com>
On Sun, Nov 22, 2015 at 11:35:07AM +0000, Philip Whineray wrote:
> Various files are owned by root with 0440 permission. Reading them is
> impossible in an unprivileged user namespace, interfering with firewall
> tools. For instance, iptables-save relies on /proc/net/ip_tables_names
> contents to dump only loaded tables.
>
> This patch assigned ownership of the following files to root in the
> current namespace:
>
> - /proc/net/*_tables_names
> - /proc/net/*_tables_matches
> - /proc/net/*_tables_targets
> - /proc/net/nf_conntrack
> - /proc/net/nf_conntrack_expect
> - /proc/net/netfilter/nfnetlink_log
>
> A mapping for root must be available, so this order should be followed:
>
> unshare(CLONE_NEWUSER);
> /* Setup the mapping */
> unshare(CLONE_NEWNET);
Applied, thanks.
prev parent reply other threads:[~2015-11-25 12:55 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-07 7:49 [PATCH] Expose x_tables /proc entries as 0444 not 0440 Philip Whineray
2015-11-11 16:50 ` Pablo Neira Ayuso
2015-11-11 18:25 ` Jozsef Kadlecsik
2015-11-11 18:40 ` Florian Westphal
2015-11-11 18:48 ` Jan Engelhardt
2015-11-11 19:35 ` Phil Whineray
2015-11-11 20:10 ` Jozsef Kadlecsik
2015-11-11 21:20 ` Phil Whineray
2015-11-14 9:12 ` [PATCH v2] Root in namespace owns x_tables /proc entries Philip Whineray
2015-11-15 18:53 ` Jozsef Kadlecsik
2015-11-16 11:56 ` Pablo Neira Ayuso
2015-11-16 12:57 ` Phil Whineray
2015-11-16 22:03 ` Eric W. Biederman
2015-11-16 21:56 ` Eric W. Biederman
2015-11-18 7:37 ` Phil Whineray
2015-11-18 9:13 ` Eric W. Biederman
2015-11-18 18:39 ` Phil Whineray
2015-11-22 11:35 ` [PATCH v3] Set /proc/net entries owner to root in namespace Philip Whineray
2015-11-25 12:55 ` Pablo Neira Ayuso [this message]
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