Bug 461326 - SELinux is preventing snmpd (snmpd_t) "read" to pipe (crond_t)
SELinux is preventing snmpd (snmpd_t) "read" to pipe (crond_t)
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: selinux-policy-targeted (Show other bugs)
All Linux
medium Severity medium
: rc
: ---
Assigned To: Daniel Walsh
Depends On:
Blocks: 432518
  Show dependency treegraph
Reported: 2008-09-05 17:46 EDT by Rich Johnson
Modified: 2012-10-16 04:32 EDT (History)
10 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2009-01-20 16:30:40 EST
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

  None (edit)
Description Rich Johnson 2008-09-05 17:46:55 EDT
Description of problem:
  SELinux is preventing snmpd (snmpd_t) "read" to pipe (crond_t) as daemon is restarted during nightly logrotate.

Version-Release number of selected component (if applicable):
  net-snmp & libs: 5.3.1-24.el5_2.1
  selinux-policy-targeted: 2.4.6-137.1.el5_2

How reproducible:

Steps to Reproduce:
1. Enable snmpd logging by creating the file /etc/snmp/snmpd.options with the following content.  (By default snmpd does not write a log file):
  OPTIONS="-Lsd -Lf /var/log/snmpd.log -p /var/run/snmpd.pid -a"

2. Enable and start the snmpd service.  (By default snmpd is not enabled):
  # chkconfig snmpd on
  # service snmpd start

3.(optional for debugging) Add this line to /etc/crontab so that logs are rotated every 5 minutes for debugging purposes:
  */5 * * * * root /usr/bin/logrotate -f /etc/logrotate.conf

Actual results:
  AVC denial:
     SELinux is preventing snmpd (snmpd_t) "read" to pipe (crond_t)

Expected results:
  no AVC denials;

Additional info:
Comment 1 Rich Johnson 2008-09-06 13:15:20 EDT
Another anomoly:
 -  snmpd starts up with context  system_u:system_r:snmpd_t  when system boots.
 -  after the logrotate it's running with context user_u:system_r:snmpd_t

I haven't seen any ill effects, but it's odd to see maintenance operations  changing process contexts.
Comment 2 Andrius Benokraitis 2008-09-09 17:43:35 EDT
Not sure if the component is net-snmp or selinux-policy-targeted but will go with the latter...
Comment 5 Daniel Walsh 2008-09-11 13:56:21 EDT
Fixed in selinux-policy-2.4.6-155.el5
Comment 11 errata-xmlrpc 2009-01-20 16:30:40 EST
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.


Note You need to log in before you can comment on or make changes to this bug.