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Date: Tue, 18 Jun 2019 06:39:34 -0400
From: Nicholas Luedtke <nicholas.luedtke@...lumni.com>
To: oss-security@...ts.openwall.com
Cc: Security Report <security-report@...smail.netflix.com>,
 security-report@...flix.com
Subject: Re: Linux and FreeBSD Kernel: Multiple TCP-based
 remote denial of service issues


> On Mon, Jun 17, 2019 at 10:56 PM Greg KH <greg@...ah.com> wrote:
> 
>> On Mon, Jun 17, 2019 at 10:33:38AM -0700, Security Report wrote:
>>> Netflix has identified several TCP networking vulnerabilities in FreeBSD
>>> and Linux kernels.
>>> 
>>> The vulnerabilities specifically relate to the minimum segment size
>> (MSS)
>>> and TCP Selective Acknowledgement (SACK) capabilities. The most serious,
>>> dubbed “SACK Panic,” allows a remotely-triggered kernel panic on recent
>>> Linux kernels.
>>> 
>>> There are patches that address most of these vulnerabilities. If patches
>>> can not be applied, certain mitigations will be effective. We recommend
>>> that affected parties enact one of those described below, based on their
>>> environment.
>> 
>> To answer all of the paniced emails I have already started to get, all
>> of these patches are now in the following Linux stable kernel releases
>> that just went out a few minutes ago:
>>        4.4.182
>>        4.9.182
>>        4.14.127
>>        4.19.52
>>        5.1.11
>> 
>> Other than the 3.16.y kernel branch, all other kernel branches are
>> end-of-life, and will not be getting updates for these, or any other,
>> bugfixes.  I do not know when/if Ben will be doing a release for 3.16.y
>> with these fixes.
>> 
>> thanks,
>> 
>> greg k-h
>> 


Now that the upstream commit appears on the git, these fixes now also appear on https://www.linuxkernelcves.com <https://www.linuxkernelcves.com/>
-Nicholas

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