oss-security - Re: Re: cve request: systemd-machined: information exposure for docker containers

Follow @Openwall on Twitter for new release announcements and other news

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Wed, 27 Jul 2016 19:05:38 +0200
From: Christian Rebischke <Chris.Rebischke@...hlinux.org>
To: oss-security@...ts.openwall.com
Subject: Re: Re: cve request: systemd-machined: information
 exposure for docker containers

On Tue, Jul 26, 2016 at 03:24:13PM -0400, cve-assign@...re.org wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
> 
> > Once docker containers register themselves to systemd-machined
> > by oci-register-machine. Any unprivileged user could run
> > machinectl to list every single containers running in the host
> > even if the containers do not belong to this user (including containers
> > belong to the root user), and access sensitive information associated
> > with any individual container including its internal IP address, OS
> > version, running processes, and file path for its rootfs.
> > 
> > $ machinectl status cc8d10c7b9892b75843d200d54d34a3a
> > cc8d10c7b9892b75843d200d54d34a3a(63633864313063376239383932623735)
> >            Since: Mon 2016-07-25 17:55:36 UTC; 34s ago
> >           Leader: 43494 (sleep)
> >          Service: docker; class container
> >             Root: /var/mnt/overlay/overlay/0429684e3da515ae4f11b8514c7b20f759613
> >          Address: 172.17.0.2
> >                   fe80::42:acff:fe11:2
> >               OS: Red Hat Enterprise Linux Server 7.2 (Maipo)
> >             Unit: docker-cc8d10c7b9892b75843d200d54d34a3a9435fe0f65527c254ebfd2d
> >                   43494 sleep 3000
> 
> Use CVE-2016-6349.

Hello,
I don't think that the bug for this problem lies in systemd.
It's more a design mistake in docker or oci-register-machine.
I have forwarded this issue to the systemd developer team and I don't
think they will fix this in the future. In their opinion it's a
bug in docker or oci-register-machine:

https://github.com/systemd/systemd/issues/3815

by the way.. I would feel glad if the security researchers would first
message the developers and then assign a CVE a bug. This is the normal
way for a full disclosure.

best regards,

Christian Rebischke

Download attachment "signature.asc" of type "application/pgp-signature" (820 bytes)

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.