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Category:   Application (Generic)  >   Net-snmp Vendors:   net-snmp.sourceforge.net
(Red Hat Issues Fix) Net-snmp Subagent Timout Lets Remote Authenticated Users Deny Service
SecurityTracker Alert ID:  1029952
SecurityTracker URL:  http://securitytracker.com/id/1029952
CVE Reference:   CVE-2012-6151   (Links to External Site)
Date:  Mar 24 2014
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 5.7.2, possibly other versions
Description:   A vulnerability was reported in Net-snmp. A remote authenticated user can cause denial of service conditions.

A remote authenticated user can send specially crafted requests to trigger a subagent timeout and cause the target service to hang or crash.

The flaw may occur when the target subagent is under heavy traffic load.

Impact:   A remote authenticated user can cause the target service to hang or crash.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2014-0322.html

Vendor URL:  www.net-snmp.org/ (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  5

Message History:   This archive entry is a follow-up to the message listed below.
Dec 12 2013 Net-snmp Subagent Timout Lets Remote Authenticated Users Deny Service



 Source Message Contents

Subject:  [RHSA-2014:0322-01] Moderate: net-snmp security update

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

Synopsis:          Moderate: net-snmp security update
Advisory ID:       RHSA-2014:0322-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2014-0322.html
Issue date:        2014-03-24
CVE Names:         CVE-2012-6151 CVE-2014-2285 
=====================================================================

1. Summary:

Updated net-snmp packages that fix two security issues are now available
for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having Moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

2. Relevant releases/architectures:

RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, 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 snmpd, the Net-SNMP daemon,
handled subagent timeouts. A remote attacker able to trigger a subagent
timeout could use this flaw to cause snmpd to loop infinitely or crash.
(CVE-2012-6151)

A denial of service flaw was found in the way the snmptrapd service, which
receives and logs SNMP trap messages, handled SNMP trap requests with an
empty community string when the Perl handler (provided by the net-snmp-perl
package) was enabled. A remote attacker could use this flaw to crash
snmptrapd by sending a trap request with an empty community string.
(CVE-2014-2285)

All net-snmp users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. After installing this
update, the snmpd and snmptrapd services will be restarted automatically.

4. Solution:

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

This update is available via the Red Hat Network. Details on how to use the
Red Hat Network to apply this update are available at
https://access.redhat.com/site/articles/11258

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

1038007 - CVE-2012-6151 net-snmp: snmpd crashes/hangs when AgentX subagent times-out
1072778 - CVE-2014-2285 net-snmp: snmptrapd crash when using a trap with empty community string

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/net-snmp-5.3.2.2-22.el5_10.1.src.rpm

i386:
net-snmp-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-debuginfo-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-libs-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-perl-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-utils-5.3.2.2-22.el5_10.1.i386.rpm

x86_64:
net-snmp-5.3.2.2-22.el5_10.1.x86_64.rpm
net-snmp-debuginfo-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-debuginfo-5.3.2.2-22.el5_10.1.x86_64.rpm
net-snmp-libs-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-libs-5.3.2.2-22.el5_10.1.x86_64.rpm
net-snmp-perl-5.3.2.2-22.el5_10.1.x86_64.rpm
net-snmp-utils-5.3.2.2-22.el5_10.1.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/net-snmp-5.3.2.2-22.el5_10.1.src.rpm

i386:
net-snmp-debuginfo-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-devel-5.3.2.2-22.el5_10.1.i386.rpm

x86_64:
net-snmp-debuginfo-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-debuginfo-5.3.2.2-22.el5_10.1.x86_64.rpm
net-snmp-devel-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-devel-5.3.2.2-22.el5_10.1.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/net-snmp-5.3.2.2-22.el5_10.1.src.rpm

i386:
net-snmp-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-debuginfo-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-devel-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-libs-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-perl-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-utils-5.3.2.2-22.el5_10.1.i386.rpm

ia64:
net-snmp-5.3.2.2-22.el5_10.1.ia64.rpm
net-snmp-debuginfo-5.3.2.2-22.el5_10.1.ia64.rpm
net-snmp-devel-5.3.2.2-22.el5_10.1.ia64.rpm
net-snmp-libs-5.3.2.2-22.el5_10.1.ia64.rpm
net-snmp-perl-5.3.2.2-22.el5_10.1.ia64.rpm
net-snmp-utils-5.3.2.2-22.el5_10.1.ia64.rpm

ppc:
net-snmp-5.3.2.2-22.el5_10.1.ppc.rpm
net-snmp-debuginfo-5.3.2.2-22.el5_10.1.ppc.rpm
net-snmp-debuginfo-5.3.2.2-22.el5_10.1.ppc64.rpm
net-snmp-devel-5.3.2.2-22.el5_10.1.ppc.rpm
net-snmp-devel-5.3.2.2-22.el5_10.1.ppc64.rpm
net-snmp-libs-5.3.2.2-22.el5_10.1.ppc.rpm
net-snmp-libs-5.3.2.2-22.el5_10.1.ppc64.rpm
net-snmp-perl-5.3.2.2-22.el5_10.1.ppc.rpm
net-snmp-utils-5.3.2.2-22.el5_10.1.ppc.rpm

s390x:
net-snmp-5.3.2.2-22.el5_10.1.s390x.rpm
net-snmp-debuginfo-5.3.2.2-22.el5_10.1.s390.rpm
net-snmp-debuginfo-5.3.2.2-22.el5_10.1.s390x.rpm
net-snmp-devel-5.3.2.2-22.el5_10.1.s390.rpm
net-snmp-devel-5.3.2.2-22.el5_10.1.s390x.rpm
net-snmp-libs-5.3.2.2-22.el5_10.1.s390.rpm
net-snmp-libs-5.3.2.2-22.el5_10.1.s390x.rpm
net-snmp-perl-5.3.2.2-22.el5_10.1.s390x.rpm
net-snmp-utils-5.3.2.2-22.el5_10.1.s390x.rpm

x86_64:
net-snmp-5.3.2.2-22.el5_10.1.x86_64.rpm
net-snmp-debuginfo-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-debuginfo-5.3.2.2-22.el5_10.1.x86_64.rpm
net-snmp-devel-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-devel-5.3.2.2-22.el5_10.1.x86_64.rpm
net-snmp-libs-5.3.2.2-22.el5_10.1.i386.rpm
net-snmp-libs-5.3.2.2-22.el5_10.1.x86_64.rpm
net-snmp-perl-5.3.2.2-22.el5_10.1.x86_64.rpm
net-snmp-utils-5.3.2.2-22.el5_10.1.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/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2012-6151.html
https://www.redhat.com/security/data/cve/CVE-2014-2285.html
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 2014 Red Hat, Inc.
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