Date: Sun, 31 Dec 1995 21:19:51 +1100 (EST) From: David Dawes <dawes@rf900.physics.usyd.edu.au> To: joerg_wunsch@uriah.heep.sax.de Cc: freebsd-hackers@freebsd.org Subject: Re: /dev/io Message-ID: <199512311019.VAA17378@rf900.physics.usyd.edu.au> In-Reply-To: <199512310841.JAA16189@uriah.heep.sax.de> from "J Wunsch" at Dec 31, 95 09:41:41 am
next in thread | previous in thread | raw e-mail | index | archive | help
>Security considerations: > >Our KDENABIO is restricted to a process with effective UID 0. Our >/dev/io is a security hole in that it allows group kmem processes to >access the registers (and i haven't seen any reason why this might be >necessary or useful). > >I think SysV allows any process to get access to IO registers via the >IO perm bitmap. :-( I don't think that's true. I'm fairly sure that only euid 0 processes can do a KDENABIO on SYSV. David
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199512311019.VAA17378>