Bug 417921 - snmptrapd when using traphandlers defaults to /tmp for temp files, breaks selinux rules
Summary: snmptrapd when using traphandlers defaults to /tmp for temp files, breaks sel...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: net-snmp
Version: 4.6
Hardware: All
OS: Linux
low
low
Target Milestone: ---
: ---
Assignee: Jan Safranek
QA Contact:
URL:
Whiteboard:
Depends On: 401211
Blocks:
TreeView+ depends on / blocked
 
Reported: 2007-12-10 11:53 UTC by Jan Safranek
Modified: 2008-07-24 19:50 UTC (History)
0 users

Fixed In Version: RHBA-2008-0700
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2008-07-24 19:50:30 UTC
Target Upstream Version:
Embargoed:


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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2008:0700 0 normal SHIPPED_LIVE net-snmp bug fix update 2008-07-23 15:45:38 UTC

Description Jan Safranek 2007-12-10 11:53:08 UTC
+++ This bug was initially created as a clone of Bug #401211 +++

Description of problem:
snmptrapd requires write access to /tmp/snmpdXXXXXX when using traphandlers. 
This can be defined through NETSNMP_TEMP_FILE_PATTERN.

I suggest creating a new context for these files as well as a context for
executing the external traphandlers.

I also see that the "self:udp_socket connect" context must be allowed as well. 
This I do not completely understand.

How reproducible:
Very

Steps to Reproduce:
1. SELinux set to enforcing
2. Create traphandler in /etc/snmp/snmptrapd.conf
3. Send trap to snmptrapd that will be executed by traphandler
4. Review audit log

-- Additional comment from jsafrane on 2007-12-03 07:28 EST --
dwalsh: what do you think about it? snmptrapd daemon really needs to
create/write/read/remove /tmp/snmp* files.


-- Additional comment from dwalsh on 2007-12-03 13:05 EST --
Daemons should not be using /tmp for anything.  /tmp is for users.
/var/run is for daemons.

/tmp can be attacked by a user.

/var/run can not.

So smpmtrapd should be setup to write its temp files to /var/run.  If it needs
to have the temporary files survive a reboot it should use /var/cache.

Comment 1 RHEL Program Management 2007-12-10 12:04:50 UTC
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.

Comment 8 errata-xmlrpc 2008-07-24 19:50:30 UTC
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.

http://rhn.redhat.com/errata/RHBA-2008-0700.html


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