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Bug 667071 - enforcing MLS: 'rpm -qa' displays nothing in single user mode
Summary: enforcing MLS: 'rpm -qa' displays nothing in single user mode
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: selinux-policy
Version: 6.1
Hardware: All
OS: Linux
low
high
Target Milestone: rc
: ---
Assignee: Miroslav Grepl
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-01-04 10:09 UTC by Milos Malik
Modified: 2012-10-15 14:31 UTC (History)
1 user (show)

Fixed In Version: selinux-policy-3.7.19-63.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-05-19 11:57:15 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2011:0526 0 normal SHIPPED_LIVE selinux-policy bug fix and enhancement update 2011-05-19 09:37:41 UTC

Description Milos Malik 2011-01-04 10:09:45 UTC 
Description of problem:
rpm and yum are silent when run in console

Version-Release number of selected component (if applicable):
selinux-policy-doc-3.7.19-60.el6.noarch
selinux-policy-mls-3.7.19-60.el6.noarch
selinux-policy-targeted-3.7.19-60.el6.noarch
selinux-policy-minimum-3.7.19-60.el6.noarch
selinux-policy-3.7.19-60.el6.noarch

How reproducible:
always

Steps to Reproduce
==================
(machine is in single user mode, root is logged in via console)
# id -Z
system_u:system_r:sysadm_t:s0-s15:c0.c1023
# rpm -qa
# echo $?
0
# yum --help
# echo $?
0
  
Actual results:


Expected results:
Comment 2 Milos Malik 2011-01-04 10:15:57 UTC 
As soon as I switch from enforcing to permissive mode, both rpm and yum work as expected.
Comment 3 Miroslav Grepl 2011-01-04 12:35:28 UTC 
Ok, I am seeing on my MLS machine in single mode:

type=1400 audit(1294144300.918:16635): avc:  denied  { read } for  pid=3288 comm="ifconfig" name="console" dev=devtmpfs ino=5036 scontext=system_u:system_r:ifconfig_t:s0-s15:c0.c1023 tcontext=system_u:object_r:console_device_t:s0 tclass=chr_file

	Was caused by:
		Missing type enforcement (TE) allow rule.

		You can use audit2allow to generate a loadable module to allow this access.

type=1400 audit(1294144194.133:16634): avc:  denied  { read } for  pid=3262 comm="rpm" name="console" dev=devtmpfs ino=5036 scontext=system_u:system_r:rpm_t:s0-s15:c0.c1023 tcontext=system_u:object_r:console_device_t:s0 tclass=chr_file

	Was caused by:
		Missing type enforcement (TE) allow rule.

		You can use audit2allow to generate a loadable module to allow this access.
Comment 4 Daniel Walsh 2011-01-04 14:33:56 UTC 
Does audit2why say this is a constraint violation?
Comment 5 Milos Malik 2011-01-04 14:55:34 UTC 
There is nothing about constraint violation if run audit2allow or audit2why on the machine.

Output of audit2allow:

#============= rpm_t ==============
allow rpm_t console_device_t:chr_file read;

Output of audit2why:

type=1400 audit(1294152588.831:540): avc:  denied  { read } for  pid=998 comm="rpm" name="console" dev=devtmpfs ino=4998 scontext=system_u:system_r:rpm_t:s0-s15:c0.c1023 tcontext=system_u:object_r:console_device_t:s0 tclass=chr_file

	Was caused by:
		Missing type enforcement (TE) allow rule.

		You can use audit2allow to generate a loadable module to allow this access.
Comment 6 Miroslav Grepl 2011-01-04 15:12:48 UTC 
Yes, there is "just" missing TE rule for that in MLS.
Comment 7 Daniel Walsh 2011-01-04 15:29:01 UTC 
Strange I see

   allow rpm_t console_device_t : chr_file { ioctl write getattr lock append open } ; 

In F15, but do not see this in the te file.
Comment 8 Miroslav Grepl 2011-01-04 15:48:07 UTC 
Well, the same for me. I am also seeing it on MLS machine

#sesearch -AC -s rpm_t -t console_device_t
Found 1 semantic av rules:

allow rpm_t console_device_t : chr_file { ioctl write getattr lock append
open } ;

and the same for ifconfig. 

I'm going to investigate it.
Comment 9 Miroslav Grepl 2011-01-04 15:51:00 UTC 
Oops, 

...  chr_file { ioctl write getattr lock append open } ;

There is no "read" permission.
Comment 10 Miroslav Grepl 2011-01-04 16:08:36 UTC 
And 

logging_send_syslog_msg() has

    # If syslog is down, the glibc syslog() function
    # will write to the console.
    term_write_console($1)
    term_dontaudit_read_console($1)
Comment 11 Milos Malik 2011-01-05 13:46:22 UTC 
Other reproducers:

# useradd --help
# usermod --help
# userdel --help

# groupadd --help
# groupmod --help
# groupdel --help
Comment 13 Daniel Walsh 2011-01-05 20:25:16 UTC 
Change useradd and groupadd to term_use_all_terms
Comment 14 Miroslav Grepl 2011-01-10 18:32:31 UTC 
Fixed in selinux-policy-3.7.19-63.el6
Comment 17 errata-xmlrpc 2011-05-19 11:57:15 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2011-0526.html
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