netdev - Re: [patch v2] net: heap overflow in __audit

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Message-Id: <20131003.160630.358364383240386879.davem@davemloft.net>
Date:	Thu, 03 Oct 2013 16:06:30 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	dan.carpenter@...cle.com
Cc:	netdev@...r.kernel.org, security@...nel.org, juri.aedla@...il.com
Subject: Re: [patch v2] net: heap overflow in __audit_sockaddr()

From: Dan Carpenter <dan.carpenter@...cle.com>
Date: Thu, 3 Oct 2013 00:27:20 +0300

> We need to cap ->msg_namelen or it leads to a buffer overflow when we
> to the memcpy() in __audit_sockaddr().  It requires CAP_AUDIT_CONTROL to
> exploit this bug.
> 
> The call tree is:
> ___sys_recvmsg()
>   move_addr_to_user()
>     audit_sockaddr()
>       __audit_sockaddr()
> 
> Reported-by: Jüri Aedla <juri.aedla@...il.com>
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> ---
> v2: The limit check to the compat code was missing as pointed out by
> Ben Hutchings.

Applied and queued up for -stable, thanks Dan.
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