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Bug 1206125 - when SLP support is enabled in ypserv then ypserv service triggers AVCs
Summary: when SLP support is enabled in ypserv then ypserv service triggers AVCs
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: selinux-policy
Version: 7.1
Hardware: All
OS: Linux
low
low
Target Milestone: rc
: ---
Assignee: Lukas Vrabec
QA Contact: Milos Malik
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2015-03-26 11:25 UTC by Milos Malik
Modified: 2015-11-19 10:27 UTC (History)
6 users (show)

Fixed In Version: selinux-policy-3.13.1-32.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-11-19 10:27:52 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2015:2300 0 normal SHIPPED_LIVE selinux-policy bug fix update 2015-11-19 09:55:26 UTC

Description Milos Malik 2015-03-26 11:25:06 UTC 
Description of problem:
 * the SLP support is by default disabled, which means that these AVCs do not usually appear

Version-Release number of selected component (if applicable):
selinux-policy-sandbox-3.13.1-23.el7.noarch
selinux-policy-devel-3.13.1-23.el7.noarch
selinux-policy-doc-3.13.1-23.el7.noarch
selinux-policy-mls-3.13.1-23.el7.noarch
selinux-policy-minimum-3.13.1-23.el7.noarch
selinux-policy-targeted-3.13.1-23.el7.noarch
selinux-policy-3.13.1-23.el7.noarch

How reproducible:
always

Steps to Reproduce:
# grep ^slp /etc/ypserv.conf 
slp: domain
slp_timeout: 10
# service ypserv start
# search for AVCs

Actual results (enforcing mode):
----
type=SYSCALL msg=audit(03/26/2015 07:14:33.540:301557) : arch=x86_64 syscall=connect success=no exit=-13(Permission denied) a0=0x7 a1=0x7fffe877be00 a2=0x10 a3=0x0 items=0 ppid=1 pid=18712 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=ypserv exe=/usr/sbin/ypserv subj=system_u:system_r:ypserv_t:s0 key=(null) 
type=AVC msg=audit(03/26/2015 07:14:33.540:301557) : avc:  denied  { connect } for  pid=18712 comm=ypserv lport=665 scontext=system_u:system_r:ypserv_t:s0 tcontext=system_u:system_r:ypserv_t:s0 tclass=tcp_socket 
----

Actual results (permissive mode):
----
type=SYSCALL msg=audit(03/26/2015 07:15:22.037:301767) : arch=x86_64 syscall=connect success=yes exit=0 a0=0x7 a1=0x7fff97645120 a2=0x10 a3=0x0 items=0 ppid=1 pid=21316 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=ypserv exe=/usr/sbin/ypserv subj=system_u:system_r:ypserv_t:s0 key=(null) 
type=AVC msg=audit(03/26/2015 07:15:22.037:301767) : avc:  denied  { name_connect } for  pid=21316 comm=ypserv dest=111 scontext=system_u:system_r:ypserv_t:s0 tcontext=system_u:object_r:portmap_port_t:s0 tclass=tcp_socket 
type=AVC msg=audit(03/26/2015 07:15:22.037:301767) : avc:  denied  { connect } for  pid=21316 comm=ypserv lport=41551 scontext=system_u:system_r:ypserv_t:s0 tcontext=system_u:system_r:ypserv_t:s0 tclass=tcp_socket 
----

Expected results:
 * no AVCs
Comment 1 Milos Malik 2015-03-26 11:36:17 UTC 
# rpm -qa yp\*
ypbind-1.37.1-7.el7.x86_64
ypserv-2.31-8.el7.x86_64
yp-tools-2.14-3.el7.x86_64
#
Comment 2 Lukas Vrabec 2015-07-09 12:50:34 UTC 
commit 8d4143da48d04104f48c60d7f99ce390dfdbd74c
Author: Lukas Vrabec <lvrabec>
Date:   Thu Jul 9 14:47:34 2015 +0200

    Allow connect ypserv to portmap_port_t.
Comment 6 errata-xmlrpc 2015-11-19 10:27:52 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.

https://rhn.redhat.com/errata/RHBA-2015-2300.html
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