Bug 621726

Summary: SELinux is preventing /usr/bin/python "write" access on /usr/share/system-config-firewall.
Product: [Fedora] Fedora Reporter: Gene Snider <genes1122>
Component: system-config-firewallAssignee: Thomas Woerner <twoerner>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: 14CC: cleitoncfl, cschwangler, deejay1, dwalsh, gavin, masami256, mgrepl, nphilipp, sarrab1976, takacsis, twoerner, wxl51
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard: setroubleshoot_trace_hash:084cdf1b2ea30fb266610d5f39817d778b9bf279375a3c63b6339b3c5856f856
Fixed In Version: system-config-firewall-1.2.27-1.fc14 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2010-08-20 02:18:12 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 Gene Snider 2010-08-05 23:20:39 UTC 
Summary:

SELinux is preventing /usr/bin/python "write" access on
/usr/share/system-config-firewall.

Detailed Description:

[SELinux is in permissive mode. This access was not denied.]

SELinux denied access requested by system-config-f. It is not expected that this
access is required by system-config-f and this access may signal an intrusion
attempt. It is also possible that the specific version or configuration of the
application is causing it to require additional access.

Allowing Access:

You can generate a local policy module to allow this access - see FAQ
(http://docs.fedoraproject.org/selinux-faq-fc5/#id2961385) Please file a bug
report.

Additional Information:

Source Context                system_u:system_r:firewallgui_t:s0-s0:c0.c1023
Target Context                system_u:object_r:usr_t:s0
Target Objects                /usr/share/system-config-firewall [ dir ]
Source                        system-config-f
Source Path                   /usr/bin/python
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           python-2.7-7.fc14
Target RPM Packages           system-config-firewall-base-1.2.25-1.fc14
Policy RPM                    selinux-policy-3.8.8-8.fc14
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Permissive
Plugin Name                   catchall
Host Name                     (removed)
Platform                      Linux (removed) 2.6.35-2.fc14.x86_64 #1 SMP Wed
                              Aug 4 19:15:25 UTC 2010 x86_64 x86_64
Alert Count                   3
First Seen                    Wed 04 Aug 2010 07:15:21 PM PDT
Last Seen                     Wed 04 Aug 2010 07:15:21 PM PDT
Local ID                      0b411366-5eef-45bf-91e5-86c698eefd64
Line Numbers                  

Raw Audit Messages            

node=(removed) type=AVC msg=audit(1280974521.535:20192): avc:  denied  { write } for  pid=30655 comm="system-config-f" name="system-config-firewall" dev=dm-0 ino=37660 scontext=system_u:system_r:firewallgui_t:s0-s0:c0.c1023 tcontext=system_u:object_r:usr_t:s0 tclass=dir

node=(removed) type=AVC msg=audit(1280974521.535:20192): avc:  denied  { remove_name } for  pid=30655 comm="system-config-f" name="fw_dbus.pyc" dev=dm-0 ino=54076 scontext=system_u:system_r:firewallgui_t:s0-s0:c0.c1023 tcontext=system_u:object_r:usr_t:s0 tclass=dir

node=(removed) type=AVC msg=audit(1280974521.535:20192): avc:  denied  { unlink } for  pid=30655 comm="system-config-f" name="fw_dbus.pyc" dev=dm-0 ino=54076 scontext=system_u:system_r:firewallgui_t:s0-s0:c0.c1023 tcontext=system_u:object_r:usr_t:s0 tclass=file

node=(removed) type=SYSCALL msg=audit(1280974521.535:20192): arch=c000003e syscall=87 success=yes exit=0 a0=7fffd98f0920 a1=0 a2=4bd5a245 a3=1 items=0 ppid=30654 pid=30655 auid=4294967295 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=4294967295 comm="system-config-f" exe="/usr/bin/python" subj=system_u:system_r:firewallgui_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  catchall,system-config-f,firewallgui_t,usr_t,dir,write
audit2allow suggests:

#============= firewallgui_t ==============
#!!!! The source type 'firewallgui_t' can write to a 'dir' of the following types:
# etc_t, firewallgui_tmp_t, tmp_t, system_conf_t

allow firewallgui_t usr_t:dir { write remove_name };
allow firewallgui_t usr_t:file unlink;
Comment 1 Daniel Walsh 2010-08-10 15:34:25 UTC 
This is either local customization.  Were you editing fw_dbus.py? If not then this is a bug in system-config-firewall, in that it is supposed to ship the compiled python executables.

If you run python /usr/share/system-config-firewall/fw_dbus.py

The problem will go a way.
Comment 2 Miroslav Grepl 2010-08-10 18:11:32 UTC 
*** Bug 622881 has been marked as a duplicate of this bug. ***
Comment 3 Gene Snider 2010-08-10 18:49:55 UTC 
Dan,

I wasn't directly editing fw_dbus.py, so I ran the command in Comment 1.  I reinstalled system-config-firewall since you mentioned there could be a problem with it.  Then I opened the Firewall gui again in System > Administration and got this denial again and another one.  The second one was 'SELinux is preventing /usr/bin/python "add-name" access on fw_dbus.pyc.'  Would you like me to submitt that denial?  Also, should I change this bug to system-config-firewall, or open a new one if that's the problem?

Thanks,
Gene
Comment 4 Daniel Walsh 2010-08-11 12:47:30 UTC 
Yes it is a bug in firewall tool.
Comment 5 Thomas Woerner 2010-08-11 13:12:20 UTC 
The package was built with python 2.6 and python 2.7 wants to recreate the object files.

There is an update pending for testing, that should fix this: system-config-firewall-1.2.27-1.fc14. It has been built with python-2.7.

The rebuild should have been done by the python rebuild, but there are some python packages that have not been rebuilt: All that do not have files in the site-packages tree as far as I can see so far, because there is no requirement for "python(abi) = 2.6", but it should be in my opinion.
Comment 6 Fedora Update System 2010-08-11 13:29:56 UTC 
system-config-firewall-1.2.27-1.fc14 has been submitted as an update for Fedora 14.
http://admin.fedoraproject.org/updates/system-config-firewall-1.2.27-1.fc14
Comment 7 Nils Philippsen 2010-08-11 17:32:36 UTC 
(In reply to comment #4)
> Yes it is a bug in firewall tool.

Just for the record (and clarification), the issue is not a bug in system-config-firewall, but rather that this package wasn't rebuilt for Python 2.7 during the recent mass rebuild (which is due to bug #623233). This means that python attempts to rebuild the python modules with invalid (old) .pyc/.pyo files every time a program is run as root, resulting in the SELinux alerts observed.
Comment 8 Fedora Update System 2010-08-11 19:47:13 UTC 
gdesklet-SlideShow-0.9-8.fc14 has been submitted as an update for Fedora 14.
http://admin.fedoraproject.org/updates/gdesklet-SlideShow-0.9-8.fc14
Comment 9 Fedora Update System 2010-08-11 19:47:22 UTC 
gdesklet-SlideShow-0.9-8.fc13 has been submitted as an update for Fedora 13.
http://admin.fedoraproject.org/updates/gdesklet-SlideShow-0.9-8.fc13
Comment 10 Fedora Update System 2010-08-12 04:05:22 UTC 
gdesklet-SlideShow-0.9-8.fc13 has been pushed to the Fedora 13 testing repository.  If problems still persist, please make note of it in this bug report.
 If you want to test the update, you can install it with 
 su -c 'yum --enablerepo=updates-testing update gdesklet-SlideShow'.  You can provide feedback for this update here: http://admin.fedoraproject.org/updates/gdesklet-SlideShow-0.9-8.fc13
Comment 11 Fedora Update System 2010-08-12 19:55:41 UTC 
gdesklet-SlideShow-0.9-8.fc14 has been pushed to the Fedora 14 testing repository.  If problems still persist, please make note of it in this bug report.
 If you want to test the update, you can install it with 
 su -c 'yum --enablerepo=updates-testing update gdesklet-SlideShow'.  You can provide feedback for this update here: http://admin.fedoraproject.org/updates/gdesklet-SlideShow-0.9-8.fc14
Comment 12 Fedora Update System 2010-08-12 20:01:56 UTC 
system-config-firewall-1.2.27-1.fc14 has been pushed to the Fedora 14 testing repository.  If problems still persist, please make note of it in this bug report.
 If you want to test the update, you can install it with 
 su -c 'yum --enablerepo=updates-testing update system-config-firewall'.  You can provide feedback for this update here: http://admin.fedoraproject.org/updates/system-config-firewall-1.2.27-1.fc14
Comment 13 Gene Snider 2010-08-13 18:07:59 UTC 
Thanks, the update described in Comment 12 does fix the AVC Denial.

Gene
Comment 14 Fedora Update System 2010-08-20 02:18:02 UTC 
gdesklet-SlideShow-0.9-8.fc13 has been pushed to the Fedora 13 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 15 Fedora Update System 2010-08-24 02:01:53 UTC 
gdesklet-SlideShow-0.9-8.fc14 has been pushed to the Fedora 14 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 16 Fedora Update System 2010-09-01 06:00:47 UTC 
system-config-firewall-1.2.27-1.fc14 has been pushed to the Fedora 14 stable repository.  If problems still persist, please make note of it in this bug report.