netdev - Re: [PATCH v2] netfilter: SYNPROXY: fix process non tcp packet bug in {ipv4,ipv6}_synproxy

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 3 Oct 2017 15:28:25 +0200
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     Lin Zhang <xiaolou4617@...il.com>
Cc:     kadlec@...ckhole.kfki.hu, fw@...len.de, davem@...emloft.net,
        kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH v2] netfilter: SYNPROXY: fix process non tcp packet bug
 in {ipv4,ipv6}_synproxy_hook

On Sat, Sep 30, 2017 at 06:25:15PM +0800, Lin Zhang wrote:
> In function {ipv4,ipv6}_synproxy_hook we expect a normal tcp packet,
> but the real server maybe reply an icmp error packet related to the 
> exist tcp conntrack, so we will access wrong tcp data.
> 
> For fix it, check for the protocol field and only process tcp traffic.

Applied, thanks.

I have made minor comestic changes to patch title:

netfilter: SYNPROXY: skip non-TCP packets from {ipv4,ipv6}_synproxy_hook

for the record.