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Bugtraq archives for 1st quarter (Jan-Mar) 1995: Re: /dev/kmem: Permission denied

Re: /dev/kmem: Permission denied

Casper Dik (casperfwi.uva.nl)
Tue, 31 Jan 1995 23:41:00 +0100 

>/dev/mem and /dev/kmem are normally group kmem, not group sys.  At
>least on any system I've ever looked at, which I mercifully has not
>included Solaris yet.

In Solaris 2.x they are owned by group sys.

>Check the permissions on (say) top; if it's setgid kmem, then kmem/mem
>will have to be group kmem, or else world read, for it to work.  Check
>your backups and see what group owned them there.

Top needs to be set-uid root on a non-nosuid mounted fs.

Casper