Bug 573414

Summary: SELinux is preventing /usr/sbin/asterisk "write" access on /.
Product: [Fedora] Fedora Reporter: Jerry Werner <g.werner>
Component: selinux-policyAssignee: Miroslav Grepl <mgrepl>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: 12CC: dnovotny, dwalsh, mgrepl, tsmetana
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
Whiteboard: setroubleshoot_trace_hash:e5838ccc48f0d842944e36874dd7dd73a0eb647835518609e0f6bdb03aeaf3e5
Fixed In Version: selinux-policy-3.6.32-106.fc12 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2010-03-30 02:10:55 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 Jerry Werner 2010-03-14 17:47:41 UTC 
Summary:

SELinux is preventing /usr/sbin/asterisk "write" access on /.

Detailed Description:

SELinux denied access requested by asterisk. It is not expected that this access
is required by asterisk 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:logrotate_t:s0-s0:c0.c1023
Target Context                system_u:object_r:root_t:s0
Target Objects                / [ dir ]
Source                        asterisk
Source Path                   /usr/sbin/asterisk
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           asterisk14-1.4.29-89.fc12
Target RPM Packages           filesystem-2.4.30-2.fc12
Policy RPM                    selinux-policy-3.6.32-99.fc12
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Plugin Name                   catchall
Host Name                     (removed)
Platform                      Linux jupiter3.werners.local
                              2.6.32.9-70.fc12.i686.PAE #1 SMP Wed Mar 3
                              04:57:21 UTC 2010 i686 i686
Alert Count                   1
First Seen                    Sun 14 Mar 2010 03:09:02 AM CDT
Last Seen                     Sun 14 Mar 2010 03:09:02 AM CDT
Local ID                      9d595674-f5ce-4529-b215-c21b93cac308
Line Numbers                  

Raw Audit Messages            

node=jupiter3.werners.local type=AVC msg=audit(1268554142.167:34267): avc:  denied  { write } for  pid=22242 comm="asterisk" name="/" dev=sda3 ino=2 scontext=system_u:system_r:logrotate_t:s0-s0:c0.c1023 tcontext=system_u:object_r:root_t:s0 tclass=dir

node=jupiter3.werners.local type=SYSCALL msg=audit(1268554142.167:34267): arch=40000003 syscall=5 success=no exit=-13 a0=bf99564c a1=241 a2=1b6 a3=811c3ee items=0 ppid=22241 pid=22242 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0 sgid=0 fsgid=0 tty=(none) ses=28 comm="asterisk" exe="/usr/sbin/asterisk" subj=system_u:system_r:logrotate_t:s0-s0:c0.c1023 key=(null)



Hash String generated from  catchall,asterisk,logrotate_t,root_t,dir,write
audit2allow suggests:

#============= logrotate_t ==============
#!!!! The source type 'logrotate_t' can write to a 'dir' of the following types:
# acct_data_t, var_spool_t, var_lib_t, abrt_var_cache_t, var_log_t, mailman_log_t, asterisk_var_lib_t, varnishlog_log_t, var_lock_t, tmp_t, logrotate_var_lib_t, logrotate_tmp_t, logfile, named_cache_t

allow logrotate_t root_t:dir write;
Comment 1 Daniel Walsh 2010-03-15 02:53:42 UTC 
Do you have logrotate watching content in /?

This looks like logrotate is leaking an open file descriptor to asterisk
Comment 2 Daniel Novotny 2010-03-15 14:22:33 UTC 
hello Jerry, do you have any logrotate configuration file for asterisk in /etc/logrotate.d ? if so, can you post it, please?
Comment 3 Jerry Werner 2010-03-16 06:55:45 UTC 
The file, dated 2009-08-25 09:32, is:
/var/log/asterisk/messages /var/log/asterisk/event_log /var/log/asterisk/queue_log {
    missingok
    notifempty
    create 0640 asterisk asterisk
    sharedscripts
    postrotate
	/usr/sbin/asterisk -rx 'logger reload' >/dev/null 2>/dev/null || true
    endscript
}
Comment 4 Daniel Novotny 2010-03-16 12:31:59 UTC 
Jerry, thanks for the file

now we see that logrotate runs /usr/sbin/asterisk in its "postrotate" script and that is why we see /usr/sbin/asterisk in "logrotate_t" context in the error message

shouldn't there be a transition rule "if logrotate runs asterisk, run it in asterisk context and not logrotate_t context"? 

reassigning to selinux-policy
Comment 5 Daniel Walsh 2010-03-16 17:31:48 UTC 
Miroslav,

F13 has

optional_policy(`
	asterisk_domtrans(logrotate_t)
')

Instead of

optional_policy(`
	asterisk_exec(logrotate_t)
	asterisk_stream_connect(logrotate_t)
	asterisk_manage_lib_files(logrotate_t)
')
Comment 6 Miroslav Grepl 2010-03-18 12:29:53 UTC 
Fixed in selinux-policy-3.6.32-104.fc12
Comment 7 Fedora Update System 2010-03-23 18:02:31 UTC 
selinux-policy-3.6.32-106.fc12 has been submitted as an update for Fedora 12.
http://admin.fedoraproject.org/updates/selinux-policy-3.6.32-106.fc12
Comment 8 Fedora Update System 2010-03-24 23:29:42 UTC 
selinux-policy-3.6.32-106.fc12 has been pushed to the Fedora 12 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 selinux-policy'.  You can provide feedback for this update here: http://admin.fedoraproject.org/updates/selinux-policy-3.6.32-106.fc12
Comment 9 Fedora Update System 2010-03-30 02:09:15 UTC 
selinux-policy-3.6.32-106.fc12 has been pushed to the Fedora 12 stable repository.  If problems still persist, please make note of it in this bug report.