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Nightmares and ciritval security issue with new LTSP



Hi,

I am having very difficult times migrating a Debian Edu 10
installation to Debian Edu 11. Until now, I could not get the LTSP
netboot image to work (running into issues with mounting the homes, or
with missing binaries, all of which I am sorting out one after the
other).

But one major problem I found is that the new system of building the
image from the main server's root filesystem is prone to building
images that contain far too much – reaching from dhcpd to freeradius
and other services that should not be in the image, to a full copy of
the LDAP data directory, Kerberos database keys, the GOSa secret, and
everything else that should by all means not be shipped to random
netboot clients over the network.

I installed a fresh Debian Edu 11 combined server in a test
environment and can reproduce that issue, meaning that in my opinion,
Debian Edu 11 **must not be used with LTSP in a production
environment** without taking very much care to mitigate this issue.

If I am not mistaken with all of this (please stop me if I am), I will
file a security bug tonight.

Cheers,
Nik

-- 
Dominik George (1. Vorstandsvorsitzender, pädagogischer Leiter)
Teckids e.V. — Digitale Freiheit mit Jugend und Bildung
https://www.teckids.org/

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