From: ludo@gnu.org (Ludovic Courtès)
To: Mark H Weaver <mhw@netris.org>
Cc: guix-devel@gnu.org
Subject: Re: Can unprivileged users corrupt the store with bad tarballs?
Date: Thu, 03 Apr 2014 21:39:06 +0200 [thread overview]
Message-ID: <87eh1ep5id.fsf@gnu.org> (raw)
In-Reply-To: <87zjk2gsoc.fsf@yeeloong.lan> (Mark H. Weaver's message of "Thu, 03 Apr 2014 14:43:31 -0400")
Mark H Weaver <mhw@netris.org> skribis:
> I was thinking about the security implications of giving out shell
> access to one of my systems running Guix.
>
> When I ask guix-daemon to build package 'foo', it will use as an input
> the source for package 'foo', usually a tarball. If the tarball is
> already in the store, it won't download it again, because it is
> effectively cached in the store.
>
> It is possible for another user on the same system to corrupt the cache,
> but manually adding a bad tarball for 'foo' to the store, in such a way
> that it would be used to build 'foo' when I ask for it?
No.
Tarballs are fixed-output derivations, so the hash of the tarball is
known in advance. Thus, when building a package, you’re sure to use the
tarball whose hash is in the recipe.
Ludo’.
next prev parent reply other threads:[~2014-04-03 19:39 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-03 18:43 Can unprivileged users corrupt the store with bad tarballs? Mark H Weaver
2014-04-03 19:39 ` Ludovic Courtès [this message]
2014-04-04 12:21 ` Mark H Weaver
2014-04-04 17:07 ` Ludovic Courtès
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