Bug 1036521 - selinux denial while using nm dbus api for team device configuration
Summary: selinux denial while using nm dbus api for team device configuration
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: selinux-policy
Version: 7.0
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: ---
Assignee: Miroslav Grepl
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-12-02 09:01 UTC by Jan Tluka
Modified: 2014-06-18 02:31 UTC (History)
1 user (show)

Fixed In Version: selinux-policy-3.12.1-109.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2014-06-13 09:26:19 UTC
Target Upstream Version:


Attachments (Terms of Use)

Description Jan Tluka 2013-12-02 09:01:49 UTC
Description of problem:

I hit another bug while working on bug #1035258. Following avc denial appears while running the reproducer in the original bug,

type=AVC msg=audit(1385977663.951:92): avc:  denied  { connectto } for  pid=783 comm="NetworkManager" path="/run/teamd/team0.sock" scontext=system_u:system_r:NetworkManager_t:s0 tcontext=system_u:system_r:NetworkManager_t:s0 tclass=unix_stream_socket
type=SYSCALL msg=audit(1385977663.951:92): arch=c000003e syscall=42 success=no exit=-13 a0=16 a1=7fff482df590 a2=1b a3=7fff482df340 items=0 ppid=1 pid=783 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="NetworkManager" exe="/usr/sbin/NetworkManager" subj=system_u:system_r:NetworkManager_t:s0 key=(null)

I tried to build a policy to allow the syscall using audit2allow,

echo "type=AVC msg=#udit(1385977663.951:92): avc:  denied  { connectto } for  pid=783 comm="NetworkManager" path="/run/teamd/team0.sock" scontext=system_u:system_r:NetworkManager_t:s0 tcontext=system_u:system_r:NetworkManager_t:s0 tclass=unix_stream_socket" | audit2allow -m teampolicy

module teampolicy 1.0;

require {
	type NetworkManager_t;
	class unix_stream_socket connectto;
}

#============= NetworkManager_t ==============

#!!!! This avc can be allowed using the boolean 'daemons_enable_cluster_mode'
allow NetworkManager_t self:unix_stream_socket connectto;

So instead of loading the policy I turned on the suggested boolean and it resolves the issue. However I'm not sure that this should be the solution since the boolean is probably intended for different purpose according to it's name.

Version-Release number of selected component (if applicable):

# rpm -qa selinux-policy\*
selinux-policy-targeted-3.12.1-103.el7.noarch
selinux-policy-3.12.1-103.el7.noarch

How reproducible:

Everytime using the reproducer in bug #1035258

Steps to Reproduce:

See bug #1035258

Actual results:
AVC denial

Expected results:
No AVC denial

Additional info:

Comment 1 Jan Tluka 2013-12-02 09:44:47 UTC
To reproduce this it's sufficient to run following command:

# nmcli c add type team

Comment 2 Milos Malik 2013-12-02 13:08:10 UTC
Thanks for the reproducer.

Comment 3 Miroslav Grepl 2013-12-03 10:07:20 UTC
Added to Fedora.

commit 0fa7c84ffc7f787024a6b001550c1a0ae79d379f
Author: Miroslav Grepl <mgrepl>
Date:   Tue Dec 3 11:06:57 2013 +0100

    Add connectto perm for NM unix stream socket

Comment 5 Miroslav Grepl 2013-12-06 12:44:23 UTC
Is there teamd service?

Comment 6 Milos Malik 2013-12-06 12:51:42 UTC
From what I see on my machine the team daemon is executed via DBus.

# rpm -ql teamd | grep service
/usr/lib/systemd/system/teamd@.service
# rpm -ql teamd | grep dbus
/etc/dbus-1/system.d/teamd.conf
#

Comment 7 Miroslav Grepl 2013-12-09 12:15:47 UTC
commit 2d0400ad6a1e7d94ad8d02c61b9aa1c7e8b53ab9
Author: Miroslav Grepl <mgrepl>
Date:   Mon Dec 9 13:15:15 2013 +0100

    Add SELinux support for the teamd package contains team network device control daemon.

Comment 9 Ludek Smid 2014-06-13 09:26:19 UTC
This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.


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