看板FB_security
标 题Re: Vulnerability - moused dependency on dbus-daemon - how to get
发信站NCTU CS FreeBSD Server (Wed Sep 26 13:16:16 2012)
转信站ptt!csnews.cs.nctu!news.cs.nctu!FreeBSD.cs.nctu!freebsd.org!owner-free
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On Tue, Sep 25, 2012 at 09:40:20PM -0700, moused86799 wrote:
> one way of attacking the OS
> 1.search the lists
> http://lists.freebsd.org/pipermail/freebsd-questions/2012-May/241042.html
> 2.)mouse intermittent works if problem with dbus-daemon
> 3.)analyze - dbus-daemon is a 'relatively unknown' and extra DEPENDENCY
> of moused
Errr... Perhaps in your configuration; perhaps also in (some) others'.
But moused is part of base FreeBSD, while dbus* is not. So it is
certainly possible to run moused without dbus-daemon.
But as a somewhat more constructive demonstration:
g1-227(10.0-C)[1] ps axwwl | egrep 'moused|dbus'
0 1461 1 0 20 0 10076 9840 select Ss - 0:00.10 /usr/sbin/=
moused -a 2.7 -p /dev/psm0 -t auto
1001 7579 1855 0 21 0 10148 9280 - RL+ 7 0:00.01 egrep mous=
ed|dbus
g1-227(10.0-C)[2]=20
That's from my laptop, running X. While I have dbus-1.4.14_4 &
dbus-glib-0.94 installed (as they are listed as dependencies for
some other ports I have installed), I decline to use them.
> 4.)set kern.securelevel=3D333
> 5.)interrupt control of moused
> root /usr/sbin/moused -F 200 -A 1.5.2.0 -a 0.7 -r high -V -p /dev/psm0 -t
> auto
> 6.)alt to port /dev/psm0 - not completed
Errr... Everything you're doing there already requires eUID 0 access,
so I'm not sure what your concern really is.
> so, how can anything dbus be ELIMINATED from the OS?
g1-227(10.0-C)[8] grep dbus /etc/rc.conf*
g1-227(10.0-C)[9]=20
> ...
> question: how can dbus or dbus-daemon be eliminated from the basic OS
> configuration for a developer workstation?
Well, I believe my laptop is configured in a way that meets the
stated criteria. (It has a local private mirror of the FreeBSD
src, ports, & doc SVN repositories, and I track stable/9 & head
on it, daily.) About the only point that comes to mind that I
haven't already pointed out is the addition of a stanza:
Section "ServerFlags"
Option "AutoAddDevices" "False"
EndSection
to xorg.conf -- though there are other ways to accomplish that, as
well (IIRC).
Of course, I avoid these fancy "desktop environment" things; the
window manager I use descends rather directly from twm (and looks
like it), but it works for me (even though I know of only 2 other
folks who I have seen use it -- one of whom is my spouse).
Peace,
david
--=20
David H. Wolfskill
[email protected]
Depriving a girl or boy of an opportunity for education is evil.
See
http://www.catwhisker.org/~david/publickey.gpg for my public key.
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