netdev - Re: [PATCH 5/9] tproxy: allow non-local binds of IPv6 sockets if IP

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]

Date:	Wed, 20 Oct 2010 21:45:17 +0900
From:	YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
To:	KOVACS Krisztian <hidden@...abit.hu>
CC:	netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
	Patrick McHardy <kaber@...sh.net>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH 5/9] tproxy: allow non-local binds of IPv6 sockets if
 IP_TRANSPARENT is enabled

Hello.

(2010/10/20 20:21), KOVACS Krisztian wrote:
> From: Balazs Scheidler<bazsi@...abit.hu>
> 
> Signed-off-by: Balazs Scheidler<bazsi@...abit.hu>
> Signed-off-by: KOVACS Krisztian<hidden@...abit.hu>
> ---
>   net/ipv6/af_inet6.c |    2 +-
>   1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
> index 6022098..9480572 100644
> --- a/net/ipv6/af_inet6.c
> +++ b/net/ipv6/af_inet6.c
> @@ -343,7 +343,7 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
>   			 */
>   			v4addr = LOOPBACK4_IPV6;
>   			if (!(addr_type&  IPV6_ADDR_MULTICAST))	{
> -				if (!ipv6_chk_addr(net,&addr->sin6_addr,
> +				if (!inet->transparent&&  !ipv6_chk_addr(net,&addr->sin6_addr,
>   						   dev, 0)) {
>   					err = -EADDRNOTAVAIL;
>   					goto out_unlock;
> 
> 

As I wrote before in other thread, this does not seem sufficient --
well, it is sufficient to allow non-local bind, but before we're
allowing this, we need add checks of source address in sending side.

Regards,

--yoshfuji
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html