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Date:   Wed, 30 Aug 2023 17:17:44 +0200
From:   Pablo Neira Ayuso <pablo@netfilter.org>
To:     Wander Lairson Costa <wander@redhat.com>
Cc:     Jozsef Kadlecsik <kadlec@netfilter.org>,
        Florian Westphal <fw@strlen.de>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Harald Welte <laforge@netfilter.org>,
        "open list:NETFILTER" <netfilter-devel@vger.kernel.org>,
        "open list:NETFILTER" <coreteam@netfilter.org>,
        "open list:NETWORKING [GENERAL]" <netdev@vger.kernel.org>,
        open list <linux-kernel@vger.kernel.org>,
        Lucas Leong <wmliang@infosec.exchange>, stable@kernel.org
Subject: Re: [PATCH nf] netfilter/xt_sctp: validate the flag_info count
Message-ID: <ZO9dmIXtmWGlrSDh@calendula>
References: <20230828221255.124812-1-wander@redhat.com>
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On Mon, Aug 28, 2023 at 07:12:55PM -0300, Wander Lairson Costa wrote:
> sctp_mt_check doesn't validate the flag_count field. An attacker can
> take advantage of that to trigger a OOB read and leak memory
> information.
> 
> Add the field validation in the checkentry function.

Applied to nf, thanks