[CentOS] CVE-2016-5195 DirtyCOW : Critical Linux Kernel Flaw
Peter Kjellström
cap at nsc.liu.se
Wed Oct 26 10:56:38 UTC 2016
On Tue, 25 Oct 2016 17:21:54 -0700
Akemi Yagi <amyagi at gmail.com> wrote:
> On Tue, Oct 25, 2016 at 10:26 AM, Leon Fauster
> <leonfauster at googlemail.com> wrote:
> > Am 25.10.2016 um 15:39 schrieb Peter Kjellström <cap at nsc.liu.se>:
> >> On Tue, 25 Oct 2016 10:06:12 +0200
> >> Christian Anthon <anthon at rth.dk> wrote:
> >>
> >>> What is the best approach on centos 6 to mitigate the problem is
> >>> officially patched? As far as I can tell Centos 6 is vulnerable to
> >>> attacks using ptrace.
> >>
> >> I can confirm that c6 is vulnerable, we're running a patched kernel
> >> (local build) using a rhel6 adaptation of the upstream fix.
> >>
> >> Ask off-list if you want an src.rpm
> >
> >
> > Hi Peter, can you confirm that its this?
> >
> > http://pastebin.centos.org/56391/
>
> That is for the EL-7.2 kernel. Peter was offering a patch for CentOS
> 6.
>
> RH released the patched kernel for EL-6.8 today. I have attached the
> diff file between 2.6.32-642.6.1.el6 and 2.6.32-642.6.2.el6. It is
> more complex because the 6 kernel is older, so required more mods, I
> suppose. Maybe that was the reason why the EL-6 update took longer
> than EL-7.
We also did a quick diff for the official c6 patch and it's almost but
not quite what we were using as a quick fix.
/Peter
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