Re: please enable CONFIG_AUDIT_LOGINUID_IMMUTABLE

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On Mon, 2013-02-18 at 13:38 -0500, Tom Callaway wrote:
> On 02/18/2013 01:32 PM, Eric Paris wrote:
> > On Mon, 2013-02-18 at 13:15 -0500, Josh Boyer wrote:
> >> On Mon, Feb 18, 2013 at 06:07:08PM +0100, Michal Schmidt wrote:
> >>> Hello Fedora kernel maintainers,
> >>>
> >>> please consider setting CONFIG_AUDIT_LOGINUID_IMMUTABLE=y for F19.
> >>>
> >>> It brings a security benefit and should be safe to turn on since
> >>> we're using systemd to start services.
> >>
> >> Refresh my memory please.  Are we using systemd to start 100% of the
> >> services provided in Fedora?  I seem to recall there are still a number
> >> of packages not using/providing systemd unit files.  Would enabling this
> >> cause them to get weird EPERM errors?
> >>
> >> Is there a simple thing to check for aside from EPERM if issues from
> >> this do pop up?
> > 
> > Daemons with a config requiring pam_lognuid.so will be unable to work if
> > they are launched by a logged in admin as opposed to systemd.  Obvious
> > work around is to change the pam config.
> > 
> > Login daemons launched by sysinit at boot will work.
> > Login daemons launched by systemd will work.
> > 
> > Login daemons launched by sysint from a logged in admin will fail.
> 
> Assuming that systemd launching an "old" sysvinit script will work, this
> should be safe. I do not believe Fedora contains any other viable init
> mechanisms anymore (upstart is gone, sysvinit is a husk).

What breaks is admin running

/usr/sbin/sshd -D

or

/usr/sbin/crond -n

unless they redo their stock pam config...

stuff from systemd is going to work fine...

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