[CentOS] SELinux and access across 'similar types'
Philippe Naudin
philippe.naudin at supagro.inra.fr
Fri Jan 6 12:40:21 UTC 2012
Le ven 06 jan 2012 04:21:14 CET, Bennett Haselton a écrit:
> On 1/6/2012 4:11 AM, Philippe Naudin wrote:
> > Le ven 06 jan 2012 02:41:02 CET, Bennett Haselton a écrit:
> >
> >> On 1/6/2012 2:24 AM, Philippe Naudin wrote:
> >>> Apache running as "init_t" is a call for troubles.
> >> Is it? OK, any idea what caused that and how to fix it?
> > No, sorry. Your httpd comes from CentOS ?
> Yes
> > Afaik, you should not have any process running in context init_t except
> > init itself. If "ps awuxZ | grep [i]nit_t" returns more than only init
> > and httpd, your problem is likely to be more complicated than a broken
> > configuration of apache.
>
> I've got a few...
>
> [root at g6950-21025 ~]# ps auwxZ | grep init_t
> system_u:system_r:init_t root 1 0.6 0.0 10368 712
> ? Ss 04:17 0:00 init [3]
>
> system_u:system_r:init_t root 537 0.2 0.1 13728 1976
> ? S<s 04:17 0:00 /sbin/udevd -d
> system_u:system_r:init_t root 1684 0.0 0.0 38880 456
> ? Ssl 04:18 0:00 brcm_iscsiuio
> system_u:system_r:init_t root 1690 0.0 0.0 12152 476
> ? Ss 04:18 0:00 iscsid
> system_u:system_r:init_t root 1691 0.0 0.4 12648 4460
> ? S<Ls 04:18 0:00 iscsid
> system_u:system_r:init_t dbus 2081 0.0 0.1 31520 1144
> ? Ssl 04:18 0:00 dbus-daemon --system
> system_u:system_r:init_t root 2215 0.0 0.1 52372 1492
> ? Ssl 04:18 0:00 automount
> system_u:system_r:init_t root 2254 0.0 0.1 62656 1212
> ? Ss 04:18 0:00 /usr/sbin/sshd
> system_u:system_r:init_t ntp 2273 0.0 0.4 23412 5044
> ? SLs 04:18 0:00 ntpd -u ntp:ntp -p /var
> /run/ntpd.pid -g
> system_u:system_r:init_t root 2287 0.1 1.0 253312 10580
> ? Ss 04:18 0:00 /usr/sbin/httpd
> system_u:system_r:init_t apache 2315 0.3 1.3 259488 13376
> ? S 04:18 0:00 /usr/sbin/httpd
> system_u:system_r:init_t apache 2316 0.0 1.0 257436 11124
> ? S 04:18 0:00 /usr/sbin/httpd
> system_u:system_r:init_t apache 2317 0.1 1.1 257436 11288
> ? S 04:18 0:00 /usr/sbin/httpd
> system_u:system_r:init_t apache 2318 0.1 1.1 257436 11292
> ? S 04:18 0:00 /usr/sbin/httpd
> system_u:system_r:init_t apache 2319 0.0 1.0 256720 10504
> ? S 04:18 0:00 /usr/sbin/httpd
> system_u:system_r:init_t apache 2320 0.1 1.0 257436 10752
> ? S 04:18 0:00 /usr/sbin/httpd
> system_u:system_r:init_t apache 2321 0.0 1.1 257436 11272
> ? S 04:18 0:00 /usr/sbin/httpd
> system_u:system_r:init_t apache 2322 0.1 1.1 257436 11356
> ? S 04:18 0:00 /usr/sbin/httpd
> system_u:system_r:init_t root 2386 0.0 0.0 3812 492
> tty1 Ss+ 04:18 0:00 /sbin/mingetty tty1
> system_u:system_r:init_t root 2387 0.0 0.0 3812 488
> tty2 Ss+ 04:18 0:00 /sbin/mingetty tty2
> system_u:system_r:init_t root 2390 0.0 0.0 3812 488
> tty3 Ss+ 04:18 0:00 /sbin/mingetty tty3
> system_u:system_r:init_t root 2392 0.0 0.0 3812 492
> tty4 Ss+ 04:18 0:00 /sbin/mingetty tty4
> system_u:system_r:init_t root 2394 0.0 0.0 3812 488
> tty5 Ss+ 04:18 0:00 /sbin/mingetty tty5
> system_u:system_r:init_t root 2397 0.0 0.0 3812 488
> tty6 Ss+ 04:18 0:00 /sbin/mingetty tty6
> system_u:system_r:init_t apache 2405 0.1 1.0 256412 11008
> ? S 04:18 0:00 /usr/sbin/httpd
> system_u:system_r:init_t root 2406 0.3 0.3 90156 3456
> ? Ss 04:18 0:00 sshd: root at pts/0
> root:system_r:initrc_t:SystemLow-SystemHigh root 2458 0.0 0.0 61176 768
> pts/0 S+ 04:18 0:00 grep init_t
>
>
>
> I also found at least one file (the audit.log file) which has file type
> file_t, even though I thought the filesystem had been re-labeled
> successfully because /var/www/html/robots.txt had the correct type:
>
> [root at g6950-21025 ~]# ls -lZ /var/www/html/robots.txt
> -rw-rw-rw- root root system_u:object_r:httpd_sys_content_t
> /var/www/html/robots.txt
> [root at g6950-21025 ~]# ls -lZ /var/log/audit/audit.log
> -rw------- root root system_u:object_r:file_t
> /var/log/audit/audit.log
>
>
> Any idea (1) what could be causing that and (2) whether it could be
> related to the problem with all those init_t processes?
It's easy : your init process is broken, all these daemons but init
are mis-labeled, so all the files they create (such as log files) are
mis-labeled.
And if the next question is "how to fix it ?", the answer is easy
too : "I don't have any clue..."
Sorry,
--
Philippe Naudin
More information about the CentOS
mailing list