Re: [RFC][PATCH v3] Unprivileged: Disable raising of privileges

[Pavel Machek]

> > - unprivileged process took action to prevent gaining a capability.
> > - exec'd suid sendmail.
> > - sendmail took action as root because it could not become someone else.
> 
> Which is a classic bug and replicated historically in cpu time, quota and
> other similar "remove rights and then .." attacks.

Yes, so from now on, when we add new "cpu cache misses quota", we
should require prctl(I_SHOULD_NOT_BE_ABLE_TO_LAUNCH_SETUID) for
unpriviledged users, first.


								Pavel
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