Re: [PATCH 00/12] Add kdbus implementation

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Wed, Oct 29, 2014 at 03:19:21PM -0700, Andy Lutomirski wrote:
> On Wed, Oct 29, 2014 at 3:00 PM, Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> >  * Attachment of trustable metadata to each message on demand, such as
> >    the sending peer's timestamp, creds, auxgroups, comm, exe, cmdline,
> >    cgroup path, capabilities, security label, audit information, etc,
> >    each taken at the time the sender issued the ioctl to send the
> >    message. Which of those are actually recorded and attached is
> >    controlled by the receiving peer.
> 
> I think that each piece of trustable metadata needs to be explicitly
> opted-in to by the sender at the time of capture.  Otherwise you're
> asking for lots of information leaks and privilege escalations.  This
> is especially important given that some of the items in the current
> list could be rather sensitive.

You do have to opt-in for this information at time of capture, so I
don't understand the issue here.  This is the same type of thing that
dbus does today, and I don't see the information leaks happening there,
do you?

thanks,

greg k-h