Re: security concerns of using guix packages

[Ludovic Courtès]

Hi!

"Cook, Malcolm" <address@hidden> skribis:

> Hello Guixen (Guixers?  Guix-noscenti?)

Simply “Guix” (pronounced like “geeks”.)   :-)

> The sys admin at my institute expresses concern that we would potentially 
> expose ourselves to additional security risk by building scientific software 
> stack in Guix where we might depend on alternate versions of, say, openssl.
>
> Do you agree this is a reasonable concern, and, if so, is there a "position 
> statement" on the matter?  

Guix provides guarantees that no traditional distro provides.

Guix users can choose to use substitutes (pre-built binaries.)  In that
case, they have to trust the binary provider:

  http://www.gnu.org/software/guix/manual/html_node/Substitutes.html

But the first big difference compared to Debian, Fedora, etc. is that
users can:

  1. Choose their binary provider–it doesn’t have to be hydra.gnu.org.

  2. Choose *not* to use binaries from a third-party, and instead build
     packages locally.

(By contrast, see the description of Debian’s “dirtiest secret” by the
former DPL in
<http://video.fosdem.org/2015/devroom-distributions/distributions_boring_solved_problem.mp4>,
at around 28 mn.)

In addition, the functional package management paradigm (see
<http://www.gnu.org/software/guix/manual/html_node/Introduction.html>)
allows users to know exactly how a package is built.  For instance,
anyone can trivially audit the recipe at
<http://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/openssl.scm#n29>.
By construction, the result of ‘guix build openssl’ corresponds
precisely to the build process that this recipe and the ones it depends
on describe.


A concern could be the time it takes for the project to deploy security
fixes.  Obviously there are much fewer Guix contributors than Debian
contributors, but so far we do pretty well nevertheless (thanks to
Mark H Weaver for the most part.)

A related concern is the time it takes to actually deploy the fixed
binaries on your machine.  This is discussed at:

  http://www.gnu.org/software/guix/manual/html_node/Security-Updates.html


I hope this clarifies things!

Thanks,
Ludo’.

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