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Category:   Application (Generic)  >   Net-snmp Vendors:   net-snmp.sourceforge.net
(Red Hat Issues Fix) Net-snmp SNMP Trap Processing Flaw Lets Remote Users Crash snmptrapd
SecurityTracker Alert ID:  1034244
SecurityTracker URL:  http://securitytracker.com/id/1034244
CVE Reference:   CVE-2014-3565   (Links to External Site)
Date:  Nov 25 2015
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Net-snmp. A remote user can cause denial of service conditions.

On systems where snmptrapd is started with the '-OQ' option, a remote user can send a specially crafted SNMP trap where the specified object type does not match the type defined in the MIB to cause the target snmptrapd service to crash.

Impact:   A remote user can cause the target snmptrapd to crash.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2015-2345.html

Vendor URL:  rhn.redhat.com/errata/RHSA-2015-2345.html (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  7

Message History:   This archive entry is a follow-up to the message listed below.
Sep 2 2014 Net-snmp SNMP Trap Processing Flaw Lets Remote Users Crash snmptrapd



 Source Message Contents

Subject:  [RHSA-2015:2345-01] Moderate: net-snmp security and bug fix update

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: net-snmp security and bug fix update
Advisory ID:       RHSA-2015:2345-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2015-2345.html
Issue date:        2015-11-19
CVE Names:         CVE-2014-3565 
=====================================================================

1. Summary:

Updated net-snmp packages that fix one security issue and several bugs are
now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Moderate security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link in the
References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. Description:

The net-snmp packages provide various libraries and tools for the Simple
Network Management Protocol (SNMP), including an SNMP library, an
extensible agent, tools for requesting or setting information from SNMP
agents, tools for generating and handling SNMP traps, a version of the
netstat command which uses SNMP, and a Tk/Perl Management Information Base
(MIB) browser.

A denial of service flaw was found in the way snmptrapd handled certain
SNMP traps when started with the "-OQ" option. If an attacker sent an SNMP
trap containing a variable with a NULL type where an integer variable type
was expected, it would cause snmptrapd to crash. (CVE-2014-3565)

This update also fixes the following bugs:

* Previously, the clientaddr option in the snmp.conf file affected outgoing
messages sent only over IPv4. With this release, outgoing IPv6 messages are
correctly sent from the interface specified by clientaddr. (BZ#1190679)

* The Net-SNMP daemon, snmpd, did not properly clean memory when reloading
its configuration file with multiple "exec" entries. Consequently, the
daemon terminated unexpectedly. Now, the memory is properly cleaned, and
snmpd no longer crashes on reload. (BZ#1228893)

* Prior to this update, snmpd did not parse complete IPv4 traffic
statistics, but reported the number of received or sent bytes in the
IP-MIB::ipSystemStatsTable only for IPv6 packets and not for IPv4.
This affected objects ipSystemStatsInOctets, ipSystemStatsOutOctets,
ipSystemStatsInMcastOctets, and ipSystemStatsOutMcastOctets. Now, the
statistics reported by snmpd are collected for IPv4 as well. (BZ#1235697)

* The Net-SNMP daemon, snmpd, did not correctly detect the file system
change from read-only to read-write. Consequently, after remounting the
file system into the read-write mode, the daemon reported it to be still
in the read-only mode. A patch has been applied, and snmpd now detects the
mode changes as expected. (BZ#1241897)

All net-snmp users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1092308 - backport diskio device filtering
1125155 - CVE-2014-3565 net-snmp: snmptrapd crash when handling an SNMP trap containing a ifMtu with a NULL type
1151310 - snmptrap can't create (or write to) /var/lib/net-snmp/snmpapp.conf if isn't run under root
1184433 - udpTable has wrong indices
1190679 - In IPv6, snmp packet does not send from specified interface assigned by clientaddr option in snmpd.conf.
1193006 - net-snmp "storageUseNFS 2" option does not report NFS mount as "Fixed Disks"
1252034 - net-snmp-python contains zeros in IP address (IPADDR type) on big-endian architectures
1252048 - net-snmp snmpd fork() overhead [fix available]
1252053 - net-snmp does not display correct lm_sensors sensor data / missing CPU cores

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
net-snmp-5.7.2-24.el7.src.rpm

x86_64:
net-snmp-5.7.2-24.el7.x86_64.rpm
net-snmp-agent-libs-5.7.2-24.el7.i686.rpm
net-snmp-agent-libs-5.7.2-24.el7.x86_64.rpm
net-snmp-debuginfo-5.7.2-24.el7.i686.rpm
net-snmp-debuginfo-5.7.2-24.el7.x86_64.rpm
net-snmp-libs-5.7.2-24.el7.i686.rpm
net-snmp-libs-5.7.2-24.el7.x86_64.rpm
net-snmp-utils-5.7.2-24.el7.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

x86_64:
net-snmp-debuginfo-5.7.2-24.el7.i686.rpm
net-snmp-debuginfo-5.7.2-24.el7.x86_64.rpm
net-snmp-devel-5.7.2-24.el7.i686.rpm
net-snmp-devel-5.7.2-24.el7.x86_64.rpm
net-snmp-gui-5.7.2-24.el7.x86_64.rpm
net-snmp-perl-5.7.2-24.el7.x86_64.rpm
net-snmp-python-5.7.2-24.el7.x86_64.rpm
net-snmp-sysvinit-5.7.2-24.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
net-snmp-5.7.2-24.el7.src.rpm

x86_64:
net-snmp-5.7.2-24.el7.x86_64.rpm
net-snmp-agent-libs-5.7.2-24.el7.i686.rpm
net-snmp-agent-libs-5.7.2-24.el7.x86_64.rpm
net-snmp-debuginfo-5.7.2-24.el7.i686.rpm
net-snmp-debuginfo-5.7.2-24.el7.x86_64.rpm
net-snmp-libs-5.7.2-24.el7.i686.rpm
net-snmp-libs-5.7.2-24.el7.x86_64.rpm
net-snmp-utils-5.7.2-24.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

x86_64:
net-snmp-debuginfo-5.7.2-24.el7.i686.rpm
net-snmp-debuginfo-5.7.2-24.el7.x86_64.rpm
net-snmp-devel-5.7.2-24.el7.i686.rpm
net-snmp-devel-5.7.2-24.el7.x86_64.rpm
net-snmp-gui-5.7.2-24.el7.x86_64.rpm
net-snmp-perl-5.7.2-24.el7.x86_64.rpm
net-snmp-python-5.7.2-24.el7.x86_64.rpm
net-snmp-sysvinit-5.7.2-24.el7.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
net-snmp-5.7.2-24.el7.src.rpm

aarch64:
net-snmp-5.7.2-24.el7.aarch64.rpm
net-snmp-agent-libs-5.7.2-24.el7.aarch64.rpm
net-snmp-debuginfo-5.7.2-24.el7.aarch64.rpm
net-snmp-devel-5.7.2-24.el7.aarch64.rpm
net-snmp-libs-5.7.2-24.el7.aarch64.rpm
net-snmp-utils-5.7.2-24.el7.aarch64.rpm

ppc64:
net-snmp-5.7.2-24.el7.ppc64.rpm
net-snmp-agent-libs-5.7.2-24.el7.ppc.rpm
net-snmp-agent-libs-5.7.2-24.el7.ppc64.rpm
net-snmp-debuginfo-5.7.2-24.el7.ppc.rpm
net-snmp-debuginfo-5.7.2-24.el7.ppc64.rpm
net-snmp-devel-5.7.2-24.el7.ppc.rpm
net-snmp-devel-5.7.2-24.el7.ppc64.rpm
net-snmp-libs-5.7.2-24.el7.ppc.rpm
net-snmp-libs-5.7.2-24.el7.ppc64.rpm
net-snmp-utils-5.7.2-24.el7.ppc64.rpm

ppc64le:
net-snmp-5.7.2-24.el7.ppc64le.rpm
net-snmp-agent-libs-5.7.2-24.el7.ppc64le.rpm
net-snmp-debuginfo-5.7.2-24.el7.ppc64le.rpm
net-snmp-devel-5.7.2-24.el7.ppc64le.rpm
net-snmp-libs-5.7.2-24.el7.ppc64le.rpm
net-snmp-utils-5.7.2-24.el7.ppc64le.rpm

s390x:
net-snmp-5.7.2-24.el7.s390x.rpm
net-snmp-agent-libs-5.7.2-24.el7.s390.rpm
net-snmp-agent-libs-5.7.2-24.el7.s390x.rpm
net-snmp-debuginfo-5.7.2-24.el7.s390.rpm
net-snmp-debuginfo-5.7.2-24.el7.s390x.rpm
net-snmp-devel-5.7.2-24.el7.s390.rpm
net-snmp-devel-5.7.2-24.el7.s390x.rpm
net-snmp-libs-5.7.2-24.el7.s390.rpm
net-snmp-libs-5.7.2-24.el7.s390x.rpm
net-snmp-utils-5.7.2-24.el7.s390x.rpm

x86_64:
net-snmp-5.7.2-24.el7.x86_64.rpm
net-snmp-agent-libs-5.7.2-24.el7.i686.rpm
net-snmp-agent-libs-5.7.2-24.el7.x86_64.rpm
net-snmp-debuginfo-5.7.2-24.el7.i686.rpm
net-snmp-debuginfo-5.7.2-24.el7.x86_64.rpm
net-snmp-devel-5.7.2-24.el7.i686.rpm
net-snmp-devel-5.7.2-24.el7.x86_64.rpm
net-snmp-libs-5.7.2-24.el7.i686.rpm
net-snmp-libs-5.7.2-24.el7.x86_64.rpm
net-snmp-utils-5.7.2-24.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

aarch64:
net-snmp-debuginfo-5.7.2-24.el7.aarch64.rpm
net-snmp-gui-5.7.2-24.el7.aarch64.rpm
net-snmp-perl-5.7.2-24.el7.aarch64.rpm
net-snmp-python-5.7.2-24.el7.aarch64.rpm
net-snmp-sysvinit-5.7.2-24.el7.aarch64.rpm

ppc64:
net-snmp-debuginfo-5.7.2-24.el7.ppc64.rpm
net-snmp-gui-5.7.2-24.el7.ppc64.rpm
net-snmp-perl-5.7.2-24.el7.ppc64.rpm
net-snmp-python-5.7.2-24.el7.ppc64.rpm
net-snmp-sysvinit-5.7.2-24.el7.ppc64.rpm

ppc64le:
net-snmp-debuginfo-5.7.2-24.el7.ppc64le.rpm
net-snmp-gui-5.7.2-24.el7.ppc64le.rpm
net-snmp-perl-5.7.2-24.el7.ppc64le.rpm
net-snmp-python-5.7.2-24.el7.ppc64le.rpm
net-snmp-sysvinit-5.7.2-24.el7.ppc64le.rpm

s390x:
net-snmp-debuginfo-5.7.2-24.el7.s390x.rpm
net-snmp-gui-5.7.2-24.el7.s390x.rpm
net-snmp-perl-5.7.2-24.el7.s390x.rpm
net-snmp-python-5.7.2-24.el7.s390x.rpm
net-snmp-sysvinit-5.7.2-24.el7.s390x.rpm

x86_64:
net-snmp-debuginfo-5.7.2-24.el7.x86_64.rpm
net-snmp-gui-5.7.2-24.el7.x86_64.rpm
net-snmp-perl-5.7.2-24.el7.x86_64.rpm
net-snmp-python-5.7.2-24.el7.x86_64.rpm
net-snmp-sysvinit-5.7.2-24.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
net-snmp-5.7.2-24.el7.src.rpm

x86_64:
net-snmp-5.7.2-24.el7.x86_64.rpm
net-snmp-agent-libs-5.7.2-24.el7.i686.rpm
net-snmp-agent-libs-5.7.2-24.el7.x86_64.rpm
net-snmp-debuginfo-5.7.2-24.el7.i686.rpm
net-snmp-debuginfo-5.7.2-24.el7.x86_64.rpm
net-snmp-devel-5.7.2-24.el7.i686.rpm
net-snmp-devel-5.7.2-24.el7.x86_64.rpm
net-snmp-libs-5.7.2-24.el7.i686.rpm
net-snmp-libs-5.7.2-24.el7.x86_64.rpm
net-snmp-utils-5.7.2-24.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

x86_64:
net-snmp-debuginfo-5.7.2-24.el7.x86_64.rpm
net-snmp-gui-5.7.2-24.el7.x86_64.rpm
net-snmp-perl-5.7.2-24.el7.x86_64.rpm
net-snmp-python-5.7.2-24.el7.x86_64.rpm
net-snmp-sysvinit-5.7.2-24.el7.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2014-3565
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2015 Red Hat, Inc.
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