[CentOS] selinux stuff - I just don't get
Brian T. Brunner
brian.t.brunner at gai-tronics.com
Mon Nov 14 16:04:53 UTC 2005
How do we define Ready? I gave that answer in the text you replied to: when it doesn't break things.
You ask about applications not being SELinux aware. The proper things for SELinux to do in those cases is advise the operator that SELinux can't manage this app because it isn't SELinux aware, and that whatever security holes that application embodies are outside the scope of SELinux.
This is consistent with SELinux being a *service* to the operator, not a bully-boss to the operator and the authors/maintainers of every package Joe Operator might have on his system.
>> SELinux is *broken* if it renders otherwise working
>> applications dysfunctional as shipped.
> Depends on your viewpoint.
No, it doesn't. It's about ownership of control. Is this RedHats' system to break if they want to compel me to do things their way? If not, then distributing SELinux with a default of 'on' when it breaks running systems is distributing a broken software package.
>SELinux works. It's just that most software isn't designed
> with it in mind. ;->
Translate: Everybody is out of step except my boy! (and those who happen to be in step with him).
I say Broken, and Disabled for Good.
The proper things for SELinux to do in cases of non-compliant apps is to advise the operator that SELinux can't manage this app because it isn't SELinux aware, and that whatever security holes that application embodies are outside the scope of SELinux. That's a *service*. Breaking said applications is a broken application.
brian.t.brunner at gai-tronics.com
>>> thebs413 at earthlink.net 11/14/05 10:49AM >>>
"Brian T. Brunner" <brian.t.brunner at gai-tronics.com> wrote:
> 1: SELinux is hereby invited to grow by giving pain to
> others, not to me. When it's ready for release to the
> unsuspecting world, let it be released in a 'default on'
> state then. Not now.
How do you define "ready"???
Do we wait until all software is SELinux-aware?
Do we wait until all sysadmins know how to use it?
Same problems with ...
and many others.
Red Hat is forcing people to adopt it, so people have to
comply. Because if they don't, they won't. And then it will
_never_ be "ready."
> SELinux is *broken* if it renders otherwise working
> applications dysfunctional as shipped.
Depends on your viewpoint.
The same was said about NPTL, ANSI C++ and GLibC 2.
Yet Red Hat regression tests _all_ its distros as a whole
before shipment. It verifies things work as they should.
That was true of the first Red Hat distro with NPTL, the
first distro with ANSI C++ compliant compilers and code, with
But then people configure things, use them in ways that
aren't stock, and things start to break. And the biggest
culprit is legacy software that isn't compatible or
compliant. Who's at fault then?
In the end, it's not about "fault" and it's not about
"broken." By the same definition, _real_ firewalls that do
outgoing as well as incoming blocking are "broken" as well.
Furthermore, the same could be said for higher-layer IDS/IPS
Red Hat always forces the issue. They get chastized for it.
Their software and/or defaults get declared as broken,
etc..., etc..., etc... In fact, I distinctly remember a
major complaint about Red Hat taking off suid on cdrecord,
which forced people to use proper permissions on the devices.
That was also, so-called, "broken." But then, Red Hat had
only one of the very few distros without the kernel 2.8.1.x
priority issue (because cdrecord didn't run suid). So who
was "broken" there?
It's all a matter of viewpoint.
> I don't mind being asked to volunteer to alpha/beta test
> software. What's done is to *compel* me to be a SELinux
> tester, or to disable it. Everybody who is inclined to
> help SELinux get ready for The Big Time Release, *please*
> accept my encouragement to do so.
SELinux is already "The Big Time" -- but the majority of
software on Linux is not. At some point, _someone_ has to
get people to care.
SELinux works. It's just that most software isn't designed
with it in mind. ;->
> Us other miserable grunts who want to beta test something
> else are best off disabling SELinux as of it's current
> "It's needed for security" meets the "necessary" test, but
> not the "proper" test, which won't be met until it works
> without breaking things.
Then you're going to be waiting _forever_.
Just like most people don't do "deny all outgoing" firewalls
either. They don't want have to deal with things.
I hate these meta-discussions. But I guess I'm tired of
seeing "compatibility issues" mistaken for "broken." SELinux
throws a wrench into a lot of programs that should be written
differently, and no amount of "SELinux hacking" is going to
be a "workaround" for some programs/configurations.
The mindset has to change. Otherwise, you will _never_ get
something like SELinux to work. And Linux won't be able to
reach higher CC levels.
Bryan J. Smith | Sent from Yahoo Mail
mailto:b.j.smith at ieee.org | (please excuse any
http://thebs413.blogspot.com/ | missing headers)
CentOS mailing list
CentOS at centos.org
This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed. If you have received this email in error please notify
the system manager.
This footnote also confirms that this email message has been swept
for the presence of computer viruses.
www.hubbell.com - Hubbell Incorporated
More information about the CentOS