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Bug 670774

Summary: enforcing MLS: "crontab -l" does not work well
Product: Red Hat Enterprise Linux 6 Reporter: Milos Malik <mmalik>
Component: selinux-policyAssignee: Miroslav Grepl <mgrepl>
Status: CLOSED ERRATA QA Contact: Milos Malik <mmalik>
Severity: medium Docs Contact:
Priority: low    
Version: 6.1CC: dwalsh, mgrepl
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: selinux-policy-3.7.19-67.el6 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-05-19 11:57:26 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Milos Malik 2011-01-19 10:53:32 UTC 
Description of problem:


Version-Release number of selected component (if applicable):
selinux-policy-mls-3.7.19-65.el6.noarch
selinux-policy-3.7.19-65.el6.noarch
selinux-policy-minimum-3.7.19-65.el6.noarch
selinux-policy-targeted-3.7.19-65.el6.noarch
selinux-policy-doc-3.7.19-65.el6.noarch

How reproducible:
always

Steps to Reproduce:
1. install MLS policy on a RHEL-6 machine
2. modify /etc/selinux/config so that the machine will start up with MLS policy
in enforcing mode
3. modify /boot/grub/grub.conf so that the machine will start up into
single-user mode
4. run 'touch /.autorelabel'
5. run 'reboot'
6. log in as root via console
7. run "crontab -l"

Actual results in enforcing mode:
# crontab -l
type=1400 audit(1295433485.395:7): avc:  denied  { read } for  pid=785 comm="unix_chkpwd" name="shadow" dev=dm-0 ino=525308 scontext=system_u:system_r:sysadm_t:s0-s15:c0.c1023 tcontext=system_u:object_r:shadow_t:s0 tclass=file
unix_chkpwd[785]: could not obtain user info (root)

Authentication service cannot retrieve authentication info
You (root) are not allowed to access to (crontab) because of pam configuration.
#

Actual results in permissive mode:
# crontab -l
type=1400 audit(1295433754.931:3): avc:  denied  { read } for  pid=1124 comm="unix_chkpwd" name="shadow" dev=dm-0 ino=1180625 scontext=system_u:system_r:sysadm_t:s0-s15:c0.c1023 tcontext=system_u:object_r:shadow_t:s0 tclass=file
type=1400 audit(1295433755.057:4): avc:  denied  { open } for  pid=1124 comm="unix_chkpwd" name="shadow" dev=dm-0 ino=1180625 scontext=system_u:system_r:sysadm_t:s0-s15:c0.c1023 tcontext=system_u:object_r:shadow_t:s0 tclass=file
no crontab for root
#

Expected results:
Comment 1 Miroslav Grepl 2011-01-19 12:38:08 UTC 
Seeing we have

ifndef(`distro_redhat',`
optional_policy(`
    auth_role(sysadm_r, sysadm_t)
')
')
Comment 2 Daniel Walsh 2011-01-19 15:48:53 UTC 
I guess we can turn this on then.
Comment 3 Miroslav Grepl 2011-01-20 12:07:25 UTC 
Fixed in selinux-policy-3.7.19-67.el6
Comment 6 errata-xmlrpc 2011-05-19 11:57:26 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