Bugtraq mailing list archives
/dev/kmem: Permission denied
From: mouse () Collatz McRCIM McGill EDU (der Mouse)
Date: Tue, 31 Jan 1995 07:44:21 -0500
When I run top or rsh into this or other machines, I get something like:
top: cannot open /dev/kmem: Permission denied kvm_open: Permission denied
I'm worried I've been screwed. Permissions on /dev/kmem (Which points to /devices/pseudo/mm@0:kmem) are:
crw-r----- 1 root sys 13, 1 Oct 25 11:33 mm@0:kmem crw-r----- 1 root sys 13, 0 Oct 25 11:33 mm@0:mem
/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. 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. As for this being a cracker's muddy footprints, I suppose that's possible. If someone knew an easy way into group sys but not group kmem, something like this might have been intended as a way of leaving a hole open for later. A stupid one, to be sure, because it alerted you to the problem, but I'm sure Sturgeon's Law is true of crackers too. der Mouse mouse () collatz mcrcim mcgill edu
Current thread:
- /dev/kmem: Permission denied der Mouse (Jan 31)
- /dev/kmem: Permission denied Chris Bulle (Jan 31)
- Re: /dev/kmem: Permission denied Casper Dik (Jan 31)
- Re: /dev/kmem: Permission denied Oliver Friedrichs (Jan 31)
- Re: /dev/kmem: Permission denied Jas (Jan 31)