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Groups > linux.debian.bugs.dist > #897418

Bug#898446: Please reconsider enabling the user namespaces by default

From Ben Hutchings <ben@decadent.org.uk>
Newsgroups linux.debian.bugs.dist, linux.debian.kernel
Subject Bug#898446: Please reconsider enabling the user namespaces by default
Date 2018-05-13 01:40 +0200
Message-ID <vOMhj-47G-3@gated-at.bofh.it> (permalink)
References <vOlh7-2Ek-5@gated-at.bofh.it> <vOlh7-2Ek-5@gated-at.bofh.it>
Organization linux.* mail to news gateway

Cross-posted to 2 groups.

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On Fri, 2018-05-11 at 20:44 +0200, Laurent Bigonville wrote:
> Source: linux
> Version: 4.16.5-1
> Severity: normal
> 
> Hi,
> 
> Firefox (and probably other applications) are using user namespaces these
> days to enhance the security.

Can you provide some information about this?

> Debian is disabling these since 2013, the original patch states it's a
> short term solution, but we are here 5 years later and they are still
> disabled.

And this still mitigates a significant fraction of the security issues
found in the kernel.

> Apparently debian (and ubuntu) and arch are the only distributions
> disabling the user namespaces.
> 
> Is there a list of remaining issues with the user namespaces? IIRC the
> only discussion I've seen were about adding upstream the option to
> disable them at runtime, nothing else.
> 
> Is it a possibility to reenable these for buster?

User namespaces *are* enabled - but by default, they can only be
created by root.  It is still possible to change that with a sysctl.

Ben.

-- 
Ben Hutchings
The most exhausting thing in life is being insincere.
                                                 - Anne Morrow Lindberg

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Thread

Bug#898446: Please reconsider enabling the user namespaces by default Laurent Bigonville <bigon@debian.org> - 2018-05-11 20:50 +0200
  Bug#898446: Please reconsider enabling the user namespaces by default Ben Hutchings <ben@decadent.org.uk> - 2018-05-13 01:40 +0200
    Bug#898446: Please reconsider enabling the user namespaces by default Frederik Himpe <frederik@frehi.be> - 2018-05-13 19:40 +0200
      Bug#898446: Please reconsider enabling the user namespaces by default Ben Hutchings <ben@decadent.org.uk> - 2018-05-14 04:50 +0200
    Bug#898446: Please reconsider enabling the user namespaces by default Moritz Mühlenhoff <jmm@inutil.org> - 2018-05-13 23:10 +0200
    Bug#898446: Please reconsider enabling the user namespaces by default Laurent Bigonville <bigon@debian.org> - 2018-05-14 07:30 +0200

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