Re: [AppArmor 00/41] AppArmor security module overview

[Pavel Machek <pavel@ucw.cz>]

Hi!

> AppArmor's Overall Design
> =========================
> 
> AppArmor protects systems from vulnerable software by confining
> processes, giving them "least privilege" access to the system's
> resources: with least privilege, processes are allowed exactly what they
> need, nothing more, and nothing less. Systems are thus protected from
> bugs in applications that would lead to privilege escalation, such as
> remote system access because of a buffer overflow in a web server, etc.
> 
> AppArmor does this by defining application profiles which list allowed
> accesses, and assigning those profiles to processes. AppArmor does *not*

You can do the same with ptrace. If that's not fast enough... improve
ptrace?

> The corollary to this is that attacks against AppArmor that start with
> "assume some unconfined process does ..." are outside the AppArmor
> threat model. Any process that might do something malicious to an

IOW AppArmor is broken by design. (One reason is: operations by unconfined
processes that did not use to be security sensitive before -- ln
shadow random_name -- are security sensitive now.)

							Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/