[arch-general] Sébastien Luttringer and Tobias Powalowski

Morten Linderud morten at linderud.pw
Sun Jul 2 23:06:04 UTC 2017

On Mon, Jul 03, 2017 at 01:01:35AM +0200, Ismael Bouya wrote:
> (Mon, Jul 03, 2017 at 12:29:44AM +0200) Morten Linderud :
> > But HTTPS doesnt matter here. We have a trusted signer inn the PKGBUILD, anyone can MITM for the good of their life.
> > Unless they can fake the signature (Hint; they cant), or trick Lennart into signing something he shouldnt (Hint; he
> > wont), we don't have a case here. It doesn't really matter if its HTTP or HTTPS.
> > 
> > You also didn't really reply about the threat model.
> If I understand correctly what Nicohood meant,
> what could happen is that version X of systemd (or anything else) has a
> well known vulnerability, fixed in X+1. X+1 is packaged, so anyone
> up to date thinks "good I'm safe now". But since a man in the middle can
> force to download version X (signed by the systemd maintainer so
> considered "secure"), he can force you to download that version when you
> create the package and you'll think you have the safe version while
> having the unsafe one.
> If that happens to the packager in archlinux, then you poisoned all
> archlinux users.
> (but then, the md5sum will be wrong anyway?)
> -- 
> Ismael

At this point we can't trust the trusted users to build and verify the correct packages, let alone maintaine a safe
infrastructure to build packages. This is a slippery slope, and i really fucking hope this isn't a serious issue any
devs or TUs are afraid of.

Morten Linderud

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