RHBA-2014:1099 - Bug Fix Advisory

Topic

Updated net-snmp packages that fix two bugs are now available for Red Hat
Enterprise Linux 6.

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.

This update fixes the following bugs:

• Previously, the SNMP daemon, snmpd, did not cache process information when

returning data for HOST-RESOURCES-MIB::hrSWRunTable. Consequently, two parallel
GET requests for a specific process in the hrSWRunTable might return
inconsistent data if the process exited in the middle of snmpd processing the
requests. One GET request could return that the process exists and the other
that it no longer exists. This update causes snmpd to cache the table of running
processes for 5 seconds. As a result, the probability of two requests returning
inconsistent data is significantly lower. However, in some cases on busy
systems, the cache may expire and cause two GET requests to return inconsistent
data. The SNMP protocol does not guarantee consistency in this situation.
(BZ#1085315)

• To speed up the reporting of storage related statistics the SNMP daemon,

snmpd, can optionally ignore remote file systems. This behavior is enabled with
the 'skipNFSInHostResources 1' option in the snmpd.conf configuration file.
Prior to this update, the MVFS file system was not ignored when this option was
set. Consequently, when snmpd was run on systems with MVFS file systems mounted,
it had to wait for remote storage information or network timeouts when gathering
storage related information. This patch causes MVFS file systems to be ignored
in the described situation, speeding snmpd up. (BZ#1086683)

Users of net-snmp are advised to upgrade to these updated packages, which fix
these bugs.

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

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.5 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 6.5 i386
• Red Hat Enterprise Linux Server - AUS 6.5 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 6.5 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 6.5 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - TUS 6.5 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.5 x86_64
• Red Hat Enterprise Linux Server - Extended Update Support from RHUI 6.5 i386
• Red Hat Enterprise Linux EUS Compute Node 6.5 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x

Fixes

CVEs

(none)

References

(none)