Bug 711498 - AVC denial on sendmail spawned from logwatch cron job
Summary: AVC denial on sendmail spawned from logwatch cron job
Keywords:
Status: CLOSED RAWHIDE
Alias: None
Product: Fedora
Classification: Fedora
Component: selinux-policy
Version: rawhide
Hardware: x86_64
OS: Linux
unspecified
medium
Target Milestone: ---
Assignee: Miroslav Grepl
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-06-07 16:24 UTC by Jerry James
Modified: 2011-06-10 03:08 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-06-10 03:08:41 UTC
Type: ---


Attachments (Terms of Use)

Description Jerry James 2011-06-07 16:24:59 UTC
Description of problem:
I have logwatch installed on a virtual Rawhide machine.  Today when the logwatch cron job ran, I got an AVC denial:

Additional Information:
Source Context                system_u:system_r:logwatch_mail_t:s0-s0:c0.c1023
Target Context                system_u:system_r:system_cronjob_t:s0-s0:c0.c1023
Target Objects                fd [ fd ]
Source                        sendmail
Source Path                   /usr/sbin/sendmail.sendmail
Port                          <Unknown>
Host                          jerry-fedora15.bluehost.com
Source RPM Packages           sendmail-8.14.5-1.fc16
Target RPM Packages           
Policy RPM                    selinux-policy-3.9.16-25.fc16
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     jerry-fedora15.bluehost.com
Platform                      Linux jerry-fedora15.bluehost.com
                              2.6.39-1.fc16.x86_64 #1 SMP Sat May 21 02:34:01
                              UTC 2011 x86_64 x86_64
Alert Count                   1
First Seen                    Tue 07 Jun 2011 10:07:04 AM MDT
Last Seen                     Tue 07 Jun 2011 10:07:04 AM MDT
Local ID                      51566a47-c76a-4517-98a3-51eb86409fed

Raw Audit Messages
type=AVC msg=audit(1307462824.740:67): avc:  denied  { use } for  pid=1917 comm="sendmail" path="pipe:[23907]" dev=pipefs ino=23907 scontext=system_u:system_r:logwatch_mail_t:s0-s0:c0.c1023 tcontext=system_u:system_r:system_cronjob_t:s0-s0:c0.c1023 tclass=fd


type=AVC msg=audit(1307462824.740:67): avc:  denied  { use } for  pid=1917 comm="sendmail" path="pipe:[23907]" dev=pipefs ino=23907 scontext=system_u:system_r:logwatch_mail_t:s0-s0:c0.c1023 tcontext=system_u:system_r:system_cronjob_t:s0-s0:c0.c1023 tclass=fd


type=SYSCALL msg=audit(1307462824.740:67): arch=x86_64 syscall=execve success=yes exit=0 a0=2bbc1f0 a1=2bbc180 a2=2bbb6f0 a3=7fff9856e370 items=0 ppid=1864 pid=1917 auid=0 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=51 sgid=51 fsgid=51 tty=(none) ses=2 comm=sendmail exe=/usr/sbin/sendmail.sendmail subj=system_u:system_r:logwatch_mail_t:s0-s0:c0.c1023 key=(null)


Version-Release number of selected component (if applicable):
logwatch-7.4.0-5.20110328svn50.fc16.noarch
sendmail-8.14.5-1.fc16.x86_64
selinux-policy-3.9.16-25.fc16.noarch

How reproducible:
Once, so far.

Steps to Reproduce:
1. Install logwatch
2. Wait for the daily cron job to run
3.
  
Actual results:
An AVC denial.

Expected results:
I'm not well-versed enough to tell whether this is logwatch / sendmail misbehaving, or whether this behavior should be allowed by SELinux.

Additional info:

Comment 1 Dominick Grift 2011-06-07 17:03:59 UTC
Did you notice any loss of functionality or any anomalies (besides the avc denial)?

Comment 2 Jerry James 2011-06-07 19:11:17 UTC
No, the logwatch email arrived in root's mailbox as usual.  I had this happen on both of my Rawhide virtual machines, by the way.  One is x86_64 and the other is i686.

Comment 3 Dominick Grift 2011-06-07 20:23:45 UTC
Silently deny attempts by logwatch_mail_t to use system_cronjob_t file descriptors:

http://git.fedorahosted.org/git/?p=selinux-policy.git;a=commitdiff;h=0d6aa56fb38eaa8061de1a59d1023c50a1bfc779


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