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Re: Debian package manager privilege escalation attack

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On Thu, Aug 12, 2021 at 08:35:42AM -0400, Kyle Edwards wrote:
> > > > 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.
> Random thought: could it be possible to restrict non-sudo users to
> installing packages from repos that are signed by a GPG key that is already
> trusted by the system (the Debian archive key)? 
Via some wrapper maybe? But at that point just use PackageKit?

> That way this attack could not be carried out. 
Only the one that relies on package content, while there are more ways to
ask apt to run a process, as listed in the article and in this thread.

> Then add a Unix group that allows apt installation from
> trusted repos, make apt setuid 
Please don't.

-- 
WBR, wRAR

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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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