linux-kernel - Re: [PATCH] ipv6: netfilter: ip6_tables: fix infoleak to userspace

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Message-ID: <4D7F5D98.1060105@trash.net>
Date:	Tue, 15 Mar 2011 13:37:44 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	Vasiliy Kulikov <segoon@...nwall.com>
CC:	linux-kernel@...r.kernel.org, security@...nel.org,
	"David S. Miller" <davem@...emloft.net>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	netfilter-devel@...r.kernel.org, netfilter@...r.kernel.org,
	coreteam@...filter.org, netdev@...r.kernel.org
Subject: Re: [PATCH] ipv6: netfilter: ip6_tables: fix infoleak to userspace

On 10.03.2011 19:13, Vasiliy Kulikov wrote:
> Structures ip6t_replace, compat_ip6t_replace, and xt_get_revision are
> copied from userspace.  Fields of these structs that are
> zero-terminated strings are not checked.  When they are used as argument
> to a format string containing "%s" in request_module(), some sensitive
> information is leaked to userspace via argument of spawned modprobe
> process.
> 
> The first bug was introduced before the git epoch;  the second was
> introduced in 3bc3fe5e (v2.6.25-rc1);  the third is introduced by
> 6b7d31fc (v2.6.15-rc1).  To trigger the bug one should have
> CAP_NET_ADMIN.

Also applied, thanks Vasiliy.
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