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Date: Wed, 5 Jul 2017 22:12:11 -0400
From: Jeffrey Walton <>
Subject: Re: systemd fails to parse user that should run service

On Sun, Jul 2, 2017 at 5:08 AM, Daniel SkowroĊ„ski <> wrote:
> Just wanted to bring attention to issue with systemd not doing what is expected when parsing User that should run service.
> When it fails to parse string starting with digit it fails back to root causing obvious threat to security.
> See discussion with developer on github:

Point 1 from
seems to be a problem:

> systemd is not the one coming up with the restrictions on user names,
> and while some distributions are less restrictive, many do enforce the
> same restrictions as we do. In order to make systemd unit files
> portable between systems we'll hence enforce something that
> resembles more the universally accepted set, rather than accept the
> most liberal set possible.

systemd is effectively setting policy where it has no business doing so.


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