Bug 874419 - SELinux is preventing /usr/sbin/ifconfig from 'write' accesses on the fifo_file /var/agns/fifo/agnLogd.
Summary: SELinux is preventing /usr/sbin/ifconfig from 'write' accesses on the fifo_fi...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: selinux-policy
Version: 17
Hardware: x86_64
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Miroslav Grepl
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: abrt_hash:e07ae64e736ed44ccee710f8441...
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-11-08 07:19 UTC by kissi7
Modified: 2012-12-20 16:26 UTC (History)
3 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2012-12-20 16:26:28 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)
File: type (9 bytes, text/plain)
2012-11-08 07:19 UTC, kissi7
no flags Details
File: hashmarkername (14 bytes, text/plain)
2012-11-08 07:19 UTC, kissi7
no flags Details

Description kissi7 2012-11-08 07:19:22 UTC
Description of problem:
I just connected to company network via AT&T client

Additional info:
libreport version: 2.0.18
kernel:         3.6.5-1.fc17.x86_64

description:
:SELinux is preventing /usr/sbin/ifconfig from 'write' accesses on the fifo_file /var/agns/fifo/agnLogd.
:
:*****  Plugin leaks (86.2 confidence) suggests  ******************************
:
:If you want to ignore ifconfig trying to write access the agnLogd fifo_file, because you believe it should not need this access.
:Then you should report this as a bug.  
:You can generate a local policy module to dontaudit this access.
:Do
:# grep /usr/sbin/ifconfig /var/log/audit/audit.log | audit2allow -D -M mypol
:# semodule -i mypol.pp
:
:*****  Plugin catchall (14.7 confidence) suggests  ***************************
:
:If you believe that ifconfig should be allowed write access on the agnLogd fifo_file 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 ifconfig /var/log/audit/audit.log | audit2allow -M mypol
:# semodule -i mypol.pp
:
:Additional Information:
:Source Context                system_u:system_r:ifconfig_t:s0
:Target Context                system_u:object_r:var_t:s0
:Target Objects                /var/agns/fifo/agnLogd [ fifo_file ]
:Source                        ifconfig
:Source Path                   /usr/sbin/ifconfig
:Port                          <Unknown>
:Host                          (removed)
:Source RPM Packages           net-tools-1.60-138.20120702git.fc17.x86_64
:Target RPM Packages           agnclient-1.0-2.0.1.3003i.fc17.i386
:Policy RPM                    selinux-policy-3.10.0-156.fc17.noarch
:Selinux Enabled               True
:Policy Type                   targeted
:Enforcing Mode                Enforcing
:Host Name                     (removed)
:Platform                      Linux (removed) 3.6.5-1.fc17.x86_64 #1 SMP Wed Oct
:                              31 19:37:18 UTC 2012 x86_64 x86_64
:Alert Count                   2
:First Seen                    2012-11-02 15:19:39 CET
:Last Seen                     2012-11-08 08:14:36 CET
:Local ID                      f0c34a81-be52-4bae-9a74-b69d3e366714
:
:Raw Audit Messages
:type=AVC msg=audit(1352358876.253:109): avc:  denied  { write } for  pid=2341 comm="ifconfig" path="/var/agns/fifo/agnLogd" dev="dm-2" ino=393373 scontext=system_u:system_r:ifconfig_t:s0 tcontext=system_u:object_r:var_t:s0 tclass=fifo_file
:
:
:type=AVC msg=audit(1352358876.253:109): avc:  denied  { write } for  pid=2341 comm="ifconfig" path="/tmp/ConfigAGN.connect.sh.txt" dev="dm-2" ino=1582294 scontext=system_u:system_r:ifconfig_t:s0 tcontext=system_u:object_r:initrc_tmp_t:s0 tclass=file
:
:
:type=AVC msg=audit(1352358876.253:109): avc:  denied  { write } for  pid=2341 comm="ifconfig" path="/tmp/ConfigAGN.connect.sh.txt" dev="dm-2" ino=1582294 scontext=system_u:system_r:ifconfig_t:s0 tcontext=system_u:object_r:initrc_tmp_t:s0 tclass=file
:
:
:type=AVC msg=audit(1352358876.253:109): avc:  denied  { read write } for  pid=2341 comm="ifconfig" path="/tmp/NetVPN.txt" dev="dm-2" ino=1582301 scontext=system_u:system_r:ifconfig_t:s0 tcontext=system_u:object_r:initrc_tmp_t:s0 tclass=file
:
:
:type=SYSCALL msg=audit(1352358876.253:109): arch=x86_64 syscall=execve success=yes exit=0 a0=1bcbd10 a1=1ba6320 a2=1bb2120 a3=60 items=0 ppid=2340 pid=2341 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm=ifconfig exe=/usr/sbin/ifconfig subj=system_u:system_r:ifconfig_t:s0 key=(null)
:
:Hash: ifconfig,ifconfig_t,var_t,fifo_file,write
:
:audit2allow
:
:#============= ifconfig_t ==============
:allow ifconfig_t initrc_tmp_t:file { write read };
:allow ifconfig_t var_t:fifo_file write;
:
:audit2allow -R
:
:#============= ifconfig_t ==============
:allow ifconfig_t initrc_tmp_t:file { write read };
:allow ifconfig_t var_t:fifo_file write;
:

Comment 1 kissi7 2012-11-08 07:19:25 UTC
Created attachment 640603 [details]
File: type

Comment 2 kissi7 2012-11-08 07:19:27 UTC
Created attachment 640604 [details]
File: hashmarkername

Comment 3 Miroslav Grepl 2012-11-08 12:05:53 UTC
What is your output of 

# ps -eZ |grep initrc

Comment 4 Daniel Walsh 2012-11-08 15:07:27 UTC
This is a leaked file descriptor from the application /tmp/ConfigAGN.connect.sh.txt and /var/agns/fifo/agnLogd

Most likely agns. or agn.

Comment 5 kissi7 2012-11-16 07:29:41 UTC
(In reply to comment #3)
> What is your output of 
> 
> # ps -eZ |grep initrc

[kissi@ibm-kissi ~]$ ps -eZ |grep initrc
system_u:system_r:initrc_t:s0     968 ?        00:01:26 agnclientd
system_u:system_r:initrc_t:s0     988 ?        00:00:00 cups-ipm-confid
system_u:system_r:initrc_t:s0     989 ?        00:00:01 agnLogd
system_u:system_r:initrc_t:s0    1093 ?        00:00:14 symcfgd
system_u:system_r:initrc_t:s0    1298 ?        00:00:00 ciscod
system_u:system_r:initrc_t:s0    1595 ?        00:00:00 vpnagentd
system_u:system_r:initrc_t:s0    1623 ?        00:00:56 rtvscand

Comment 6 Daniel Walsh 2012-11-17 12:24:47 UTC
added fixes for this in selinux-policy-3.11.1-55.fc18.noarch

d6b242a4433693353a0fd6eb95939796ec16e062
e06fd8c42ff437fd0a84ab0e6d7e78e4c26a610d

I think we should just start allowing all domains started by init to use initrc_tmp_t files that are leaked to them.  Secondly we should don't audit var_t leaked fifo_files, the patch I attached dontaudits all fifo_file leaks to ifconfig.


kissi7, 

Probably neither of these breaks anything.  But we should fix them.  Looks like one of your services is leaking open file descriptors to applications that it forks/execs.  You may want to open a bug report with the provider of this software to close the sockets on /var/agns/fifo/agnLogd when it is execed.

fcntl(fd, FD_SETFD, FD_CLOEXEC)

Comment 7 Miroslav Grepl 2012-11-19 13:05:42 UTC
Added.

commit a89614dd624d1222962dfda0888e7e57b66e66d3
Author: Miroslav Grepl <mgrepl>
Date:   Mon Nov 19 14:04:26 2012 +0100

    Allow all daemons and systemprocesses to use inherited initrc_tmp_t files

commit bc92de266e2da84ffd0714250d9c12423b7c05b7
Author: Dan Walsh <dwalsh>
Date:   Sat Nov 17 07:18:20 2012 -0500

    dontaudit ifconfig_t looking at fifo_files that are leaked to it, allow it to use initrc_tmp_t, which is leaked.

Comment 8 Fedora Update System 2012-11-21 11:53:18 UTC
selinux-policy-3.10.0-161.fc17 has been submitted as an update for Fedora 17.
https://admin.fedoraproject.org/updates/selinux-policy-3.10.0-161.fc17

Comment 9 Fedora Update System 2012-11-22 03:55:17 UTC
Package selinux-policy-3.10.0-161.fc17:
* should fix your issue,
* was pushed to the Fedora 17 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing selinux-policy-3.10.0-161.fc17'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2012-18787/selinux-policy-3.10.0-161.fc17
then log in and leave karma (feedback).

Comment 10 Fedora Update System 2012-12-20 16:26:30 UTC
selinux-policy-3.10.0-161.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.


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