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Bug 1018763

Summary:	SELinux is preventing /usr/bin/passwd from using the 'sys_admin' capabilities.
Product:	Red Hat Enterprise Linux 7	Reporter:	Martin <mholec>
Component:	selinux-policy	Assignee:	Miroslav Grepl <mgrepl>
Status:	CLOSED NOTABUG	QA Contact:	BaseOS QE Security Team <qe-baseos-security>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.0	CC:	jcpunk, mtruneck, tpelka
Target Milestone:	beta
Target Release:	7.0
Hardware:	x86_64
OS:	Unspecified
Whiteboard:	abrt_hash:8ebef673e8d999307f159040ae195831b574b2bf4ad3284f7fdf4848da326a79
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-01-03 16:46:03 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 Martin 2013-10-14 11:42:30 UTC

Description of problem:
Description of problem:
Testing  Multiple Graphical Login

1.    Install RHEL desktop on multiple virtual or bare metal machines.
2.    Edit the /etc/dconf/profile/user file on every client. If one does not already exist, create it.
3.    Add a line containing service-db:keyfile/user to the file and save your changes.
4.    Setup shared /home directory via NFS on each machine. Put the following line into /etc/fstab
    nest.test.redhat.com:/mnt/qa/scratch/rhel7-gnome-shell-shared-home  /home  nfs  rw  0 0
5.    Create account with username "test" and password "redhat".
6.    Login to Gnome.
SELinux is preventing /usr/bin/passwd from using the 'sys_admin' capabilities.

*****  Plugin catchall (100. confidence) suggests   **************************

If you believe that passwd should have the sys_admin capability by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# grep passwd /var/log/audit/audit.log | audit2allow -M mypol
# semodule -i mypol.pp

Additional Information:
Source Context                unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023
Target Context                unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023
Target Objects                 [ capability ]
Source                        passwd
Source Path                   /usr/bin/passwd
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           passwd-0.79-1.el7.x86_64
Target RPM Packages           
Policy RPM                    selinux-policy-3.12.1-86.el7.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Host Name                     (removed)
Platform                      Linux (removed) 3.10.0-33.el7.x86_64 #1 SMP Fri
                              Oct 4 11:13:14 EDT 2013 x86_64 x86_64
Alert Count                   1
First Seen                    2013-10-10 14:57:03 BST
Last Seen                     2013-10-10 14:57:03 BST
Local ID                      782db1b1-f3be-49dc-b25f-9c84af8a36e0

Raw Audit Messages
type=AVC msg=audit(1381413423.732:530): avc:  denied  { sys_admin } for  pid=2513 comm="passwd" capability=21  scontext=unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023 tcontext=unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023 tclass=capability


type=SYSCALL msg=audit(1381413423.732:530): arch=x86_64 syscall=write success=yes exit=EPERM a0=2 a1=7fe9cadc3243 a2=1 a3=0 items=0 ppid=1849 pid=2513 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=tty2 ses=2 comm=passwd exe=/usr/bin/passwd subj=unconfined_u:unconfined_r:passwd_t:s0-s0:c0.c1023 key=(null)

Hash: passwd,passwd_t,passwd_t,capability,sys_admin

Additional info:
reporter:       libreport-2.1.7
hashmarkername: setroubleshoot
kernel:         3.10.0-33.el7.x86_64
type:           libreport

Comment 2 Miroslav Grepl 2013-10-16 08:40:53 UTC

Martin,
if you allow booleans from previous bugs, are you able reproduce this sys_admin capability AVC?

Comment 3 Martin 2013-12-16 13:49:18 UTC

(In reply to Miroslav Grepl from comment #2)
> Martin,
> if you allow booleans from previous bugs, are you able reproduce this
> sys_admin capability AVC?

No I haven't reproduced this problem since setting: "setsebool -P use_nfs_home_dirs 1".

Comment 4 Michal Trunecka 2014-01-03 10:08:16 UTC

So, is this a notabug?

Comment 5 Martin 2014-01-03 16:46:03 UTC

It's not a bug, it's a feature!