Date: Wed, 16 Oct 1996 03:52:05 +1000 From: Bruce Evans <bde@zeta.org.au> To: bde@zeta.org.au, jgreco@brasil.moneng.mei.com Cc: freebsd-hackers@freebsd.org, j@uriah.heep.sax.de Subject: Re: /sbin/init permission Message-ID: <199610151752.DAA18137@godzilla.zeta.org.au>
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>> >> -r-sr-x--- 1 uucp uucp 90112 Oct 2 04:09 /usr/libexec/uucp/uuxqt >> > >> >Seems to make sense. >> >> It makes no sense for it to be unreadable, and its nonreadability and >> nonexecutability by `other' breaks the usability of an nfs-mounted /usr >> (for the rare case that root wants to run this directly). (If it were >> only readable, then root could copy it and run the copy.) > >PLEASE DO NOT MAKE THIS EXECUTABLE BY 'other'. It is very possible to >bring a system to its knees if there is even a moderate amount of UUCP >work by doing > >while true; do > /usr/libexec/uucp/uuxqt& >done Is this much different from any other fork bomb? >You probably do not want to run uuxqt if you have a NFS mounted /usr because >you probably have a NFS mounted /var and Taylor himself says not to run >UUCP on a NFS mounted partition due to locking problems. Well, I have an nfs-mounted /usr, a ufs /var, and don't normally run uucp :-). Bruce
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