netdev - Re: [PATCH v2] ipv4: netfilter: ipt_CLUSTERIP: fix buffer overflow

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Message-ID: <4D861298.1040700@trash.net>
Date:	Sun, 20 Mar 2011 15:43:36 +0100
From:	Patrick McHardy <kaber@...sh.net>
To:	Changli Gao <xiaosuo@...il.com>
CC:	Vasiliy Kulikov <segoon@...nwall.com>,
	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 v2] ipv4: netfilter: ipt_CLUSTERIP: fix buffer overflow

Am 17.03.2011 13:15, schrieb Changli Gao:
> On Thu, Mar 17, 2011 at 7:32 PM, Vasiliy Kulikov <segoon@...nwall.com> wrote:
>> 'buffer' string is copied from userspace.  It is not checked whether it is
>> zero terminated.  This may lead to overflow inside of simple_strtoul().
>> Changli Gao suggested to copy not more than user supplied 'size' bytes.
>>
>> It was introduced before the git epoch.  Files "ipt_CLUSTERIP/*" are
>> root writable only by default, however, on some setups permissions might be
>> relaxed to e.g. network admin user.
>>
>> Signed-off-by: Vasiliy Kulikov <segoon@...nwall.com>
> Acked-by: Changli Gao <xiaosuo@...il.com>
> 
> 

Applied, thanks everyone.
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