security.bsd.see_other_uids for jails

joerg at joerg at
Sun May 28 06:50:39 PDT 2006

On Sun, May 28, 2006 at 03:46:06PM +0200, Anatoli Klassen wrote:
> Hi All,
> if security.bsd.see_other_uids is set to 0, users from the main system 
> can still see processes from jails if they have (by accident) the save uid.
> For me it's wrong behavior because the main system and the jail are two 
> different systems where uids are independent.

Sorry but you have far bigger security problems if you create such a
setup. E.g. "users" from the outer system can ptrace the processes in
the jail with the same uid.

Short answer is: don't do that.


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