SE Linux and /proc files

SE Linux and /proc files

[Albert Cahalan]

At an extreme security level, users can't see processes
running in other roles. At a low security level, they can.

How about a middle ground? I've been thinking of adding
a new /proc file containing some basic data for procps.
It wouldn't have EIP, ESP, WCHAN, and a few others that
are quite revealing to an attacker. A list of items that
would be enough for basic procps functionality is:

class   - scheduling class
cmd     - COMMAND, w/o args
cstime  - CPU time
cutime  - CPU time
euid
nice
nlwp  - num threads
pcpu  - %CPU (once implemented)
pgrp
ppid
priority
processor
resident
rtprio
ruid
sched  - RT scheduling class
session
share  - memory info
size
start_time
state
stime  - CPU time
tgid
tid
tpgid
tty
utime  - CPU time
vm_lock - locked mem (just need yes/no)
vm_rss
vm_size

Might this be useful?

Anything on that list more troublesome than cmd?



--
This message was distributed to subscribers of the selinux mailing list.
If you no longer wish to subscribe, send mail to majordomo@tycho.nsa.gov with
the words "unsubscribe selinux" without quotes as the message.