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Groups > linux.debian.devel > #100977

Re: Debian package manager privilege escalation attack

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 ❦ 12 August 2021 10:39 +05, Andrey Rahmatullin:

>> I just ran across this article
>> https://blog.ikuamike.io/posts/2021/package_managers_privesc/ I tested
>> the attacks on Debian 11 and they work successfully giving me a root
>> shell prompt.
> I don't think calling this "privilege escalation" or "attack" is correct.
> The premise of the post is "the user should not be a root/admin user but
> has been assigned sudo permissions to run the package manager" and one
> doesn't really need a long article to prove that it's not secure.

I think the article is interesting nonetheless. Some people may think
that granting sudo on apt is OK. In the past, I think "apt install
./something.deb" was not possible.

I give myself password less sudo to "apt update" (without additional
options), "apt upgrade" (same), "apt full-upgrade" (same). I was
thinking this should be safe, but now I need to check if the pager is
properly restricted when displaying NEWS file. A similar
"vulnerability" was fixed in systemd:

 - https://gtfobins.github.io/gtfobins/systemctl/
 - https://github.com/keszybz/systemd/commit/612ebf6c913dd0e4197c44909cb3157f5c51a2f0

Maybe it would be worth to also set LESSSECURE (less is not the default
pager on minimal installs but I think it is the most common, more cannot
be secured this way).
-- 
Use data arrays to avoid repetitive control sequences.
            - The Elements of Programming Style (Kernighan & Plauger)

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Debian package manager privilege escalation attack Timothy M Butterworth <timothy.m.butterworth@gmail.com> - 2021-08-12 05:40 +0200
  Re: Debian package manager privilege escalation attack Brian Thompson <brian@hashvault.io> - 2021-08-12 06:00 +0200
    Re: Debian package manager privilege escalation attack Andrey Rahmatullin <wrar@debian.org> - 2021-08-12 07:50 +0200
      Re: Debian package manager privilege escalation attack Brian Thompson <brian@hashvault.io> - 2021-08-12 08:20 +0200
        Re: Debian package manager privilege escalation attack Andrey Rahmatullin <wrar@debian.org> - 2021-08-12 08:30 +0200
          Re: Debian package manager privilege escalation attack Paul Tagliamonte <paultag@debian.org> - 2021-08-12 15:00 +0200
  Re: Debian package manager privilege escalation attack Andrey Rahmatullin <wrar@debian.org> - 2021-08-12 07:40 +0200
    Re: Debian package manager privilege escalation attack Vincent Bernat <bernat@debian.org> - 2021-08-12 08:40 +0200
      Re: Debian package manager privilege escalation attack Andrey Rahmatullin <wrar@debian.org> - 2021-08-12 08:40 +0200
        Re: Debian package manager privilege escalation attack Vincent Bernat <bernat@debian.org> - 2021-08-12 09:00 +0200
      Re: Debian package manager privilege escalation attack Ansgar <ansgar@43-1.org> - 2021-08-12 10:40 +0200
        Re: Debian package manager privilege escalation attack Vincent Bernat <bernat@debian.org> - 2021-08-12 11:20 +0200
      Re: Debian package manager privilege escalation attack Philipp Kern <pkern@debian.org> - 2021-08-12 11:20 +0200
      Re: Debian package manager privilege escalation attack David Kalnischkies <david@kalnischkies.de> - 2021-08-12 13:50 +0200
      Re: Debian package manager privilege escalation attack Kyle Edwards <kyle.edwards@kitware.com> - 2021-08-12 14:40 +0200
        Re: Debian package manager privilege escalation attack Andrey Rahmatullin <wrar@debian.org> - 2021-08-12 14:50 +0200
  Re: Debian package manager privilege escalation attack Niels Thykier <niels@thykier.net> - 2021-08-12 07:40 +0200
    Re: Debian package manager privilege escalation attack Andrey Rahmatullin <wrar@debian.org> - 2021-08-12 08:20 +0200
      Re: Debian package manager privilege escalation attack Brian Thompson <brian@hashvault.io> - 2021-08-12 08:30 +0200
        Re: Debian package manager privilege escalation attack Andrey Rahmatullin <wrar@debian.org> - 2021-08-12 08:40 +0200
        Re: Debian package manager privilege escalation attack Polyna-Maude Racicot-Summerside <debian@polynamaude.com> - 2021-08-12 12:30 +0200
          Re: Debian package manager privilege escalation attack Philipp Kern <pkern@debian.org> - 2021-08-12 13:50 +0200
            Re: Debian package manager privilege escalation attack Marc Haber <mh+debian-devel@zugschlus.de> - 2021-08-12 18:00 +0200
              Re: Debian package manager privilege escalation attack Philipp Kern <pkern@debian.org> - 2021-08-12 20:10 +0200
                Re: Debian package manager privilege escalation attack Russ Allbery <rra@debian.org> - 2021-08-12 21:10 +0200
    Re: Debian package manager privilege escalation attack Brian Thompson <brian@hashvault.io> - 2021-08-12 08:20 +0200
      Re: Debian package manager privilege escalation attack Holger Levsen <holger@layer-acht.org> - 2021-08-12 15:20 +0200
        Re: Debian package manager privilege escalation attack Holger Levsen <holger@layer-acht.org> - 2021-08-12 18:10 +0200
        Re: Debian package manager privilege escalation attack Wouter Verhelst <wouter@debian.org> - 2021-08-16 16:50 +0200

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