oss-security - Re: CVE request: Linux kernel: panic while appending data to a corked IPv6 socket in ip6_append_data

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Message-ID: <20130723194954.GC19764@hunt>
Date: Tue, 23 Jul 2013 12:49:54 -0700
From: Seth Arnold <seth.arnold@...onical.com>
To: P J P <ppandit@...hat.com>
Cc: oss security list <oss-security@...ts.openwall.com>
Subject: Re: CVE request: Linux kernel: panic while appending
 data to a corked IPv6 socket in ip6_append_data_mtu

On Wed, Jul 24, 2013 at 01:06:38AM +0530, P J P wrote:
>   Hi,
> 
> Linux kernel built with the IPv6 networking support is vulnerable to a crash
> while appending data to an IPv6 socket with UDP_CORKED option set. UDP_CORK

UDP_CORKED? I don't see this string in my /usr/include/ or recent Linux
git tree.

Am I missing something?

Thanks

> enables accumulating data and sending it as single datagram.
> 
> An unprivileged user/program could use this flaw to crash the
> kernel, resulting in local DoS.
> 
> Upstream fix:
> -------------
>  -> https://git.kernel.org/linus/75a493e60ac4bbe2e977e7129d6d8cbb0dd236be
> 
> Reference:
> ----------
>  -> https://bugzilla.redhat.com/show_bug.cgi?id=987633

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