Date: Tue, 18 Jun 2019 01:19:11 +0400 From: Loganaden Velvindron <loganaden@...il.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 Can the netflix guys tell us if they have seen exploits in the wild ? 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 >
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