Bug 747321 - SELinux is preventing /usr/sbin/sshd from getattr operation on /root/.hushlogin file
Summary: SELinux is preventing /usr/sbin/sshd from getattr operation on /root/.hushlog...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: selinux-policy
Version: 6.2
Hardware: All
OS: Linux
unspecified
medium
Target Milestone: rc
: ---
Assignee: Miroslav Grepl
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-10-19 13:44 UTC by Milos Malik
Modified: 2012-10-16 11:45 UTC (History)
3 users (show)

Fixed In Version: selinux-policy-3.7.19-119.el6
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-12-06 10:20:21 UTC
Target Upstream Version:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2011:1511 0 normal SHIPPED_LIVE selinux-policy bug fix and enhancement update 2011-12-06 00:39:17 UTC

Description Milos Malik 2011-10-19 13:44:34 UTC
Description of problem:


Version-Release number of selected component (if applicable):
selinux-policy-minimum-3.7.19-118.el6.noarch
selinux-policy-mls-3.7.19-118.el6.noarch
selinux-policy-targeted-3.7.19-118.el6.noarch
selinux-policy-3.7.19-118.el6.noarch
selinux-policy-doc-3.7.19-118.el6.noarch

How reproducible:
always

Steps to Reproduce:
1. get a fresh RHEL-6.2 machine
2. log in as root
3. touch /root/.hushlogin
4. restorecon -Rv /root
5. log out
6. log in as root via ssh
7. ausearch -m avc -m user_avc -ts recent
  
Actual results:
----
time->Wed Oct 19 09:32:32 2011
type=SYSCALL msg=audit(1319031152.398:84367): arch=40000003 syscall=195 success=no exit=-13 a0=bf8b53bc a1=bf8b535c a2=924ff4 a3=bf8b53bc items=0 ppid=27275 pid=27283 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=50 comm="sshd" exe="/usr/sbin/sshd" subj=unconfined_u:system_r:sshd_t:s0-s0:c0.c1023 key=(null)
type=AVC msg=audit(1319031152.398:84367): avc:  denied  { getattr } for  pid=27283 comm="sshd" path="/root/.hushlogin" dev=dm-0 ino=131098 scontext=unconfined_u:system_r:sshd_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:local_login_home_t:s0 tclass=file
----

Expected results:
* no AVCs

Comment 1 Miroslav Grepl 2011-10-19 13:46:36 UTC
Are you able to log in?

Comment 2 Milos Malik 2011-10-19 13:47:23 UTC
Yes, I'm able to log in.

Comment 3 Milos Malik 2011-10-19 13:53:37 UTC
I suspect that more services (not just login and sshd) will read this file.

Comment 4 Miroslav Grepl 2011-10-19 13:57:34 UTC
Really read?

What are you getting in permissive mode?

Comment 5 Milos Malik 2011-10-19 13:59:40 UTC
You're right. getattr is enough. Here is what I see in permissive mode:
----
time->Wed Oct 19 09:58:36 2011
type=SYSCALL msg=audit(1319032716.579:84457): arch=40000003 syscall=195 success=yes exit=0 a0=bfd301fc a1=bfd3019c a2=941ff4 a3=bfd301fc items=0 ppid=27477 pid=27481 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=pts1 ses=55 comm="sshd" exe="/usr/sbin/sshd" subj=unconfined_u:system_r:sshd_t:s0-s0:c0.c1023 key=(null)
type=AVC msg=audit(1319032716.579:84457): avc:  denied  { getattr } for  pid=27481 comm="sshd" path="/root/.hushlogin" dev=dm-0 ino=131098 scontext=unconfined_u:system_r:sshd_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:local_login_home_t:s0 tclass=file
----

Comment 6 Daniel Walsh 2011-10-19 14:17:11 UTC
Lets add this to the auth_use_pam()

Comment 7 Miroslav Grepl 2011-10-20 13:48:11 UTC
Fixed in selinux-policy-3.7.19-119.el6.noarch

Comment 11 errata-xmlrpc 2011-12-06 10:20:21 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2011-1511.html


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