Red Hat ENTERPRISE LINUX 5.5 - TECHNICAL NOTES Manual page 187

The Simple Network Management Protocol (SNMP) is a protocol used for network management.
The net-snmp packages include various SNMP tools: an extensible agent; an SNMP library; 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 MIB browser.
These updated net-snmp packages provide fixes for the following bugs:
* when two default routes with the same content existed in the machine's routing table, the snmpd
daemon could have entered an endless loop and logged the following error to syslog: "error on
subcontainer 'dr_index' insert(-1)". Processing of the routing table has been improved in this update so
that snmpd no longer enters an endless route when this occurs.
* on 64-bit systems experiencing very high network traffic, the snmpd daemon periodically logged the
following message to syslog: "truncating integer value > 32 bits". With this update, snmpd correctly
adjusts reported counters and no error is logged.
* the snmpd daemon did not expect the packet counters in the /proc/net/snmp and /proc/net/snmp6
directories to be 64-bit on 64-bit systems. When these counters exceeded 32 bits in size, which
occurred when the Linux kernel sent or received greater than 4,294,967,296 (2^32) packets, then the
snmpd daemon would terminate abnormally. With this update, the snmpd daemon no longer crashes
when it encounters a packet counter in the directories listed above that is greater than 32 bits in size,
thus resolving the issue.
* the snmpd daemon contained several memory leaks in the ipNetToMediaTable, mteEventSetTable
and ipAddressPrefixTable objects. These slow memory leaks could have caused problems on
machines with multi-month uptimes. These memory leaks have been plugged in these updated
packages. (BZ#518633
1498
BZ#515650
)
* this update ensures that the snmpd daemon is able to process and respond to broadcast UDP
1499
requests. (BZ#521175
* header files contained within the net-snmp-devel package differed according to the architecture
of the system, i386 or Itanium, they were installed on. Because net-snmp is a multilib package, this
update moves architecture-dependent header files into separate files, thus allowing development
packages for different architectures to be installed on the same system.
* the libnetsnmp shared object library maintains cached data in the /usr/share/snmp/mibs/.index file.
Because this file did not have the proper SELinux context, SELinux denied applications write access to
this file. This update ensures that this .index file is properly labeled with the correct SELinux context so
that applications are permitted to access it.
* the snmpd daemon was unable to process requests to create a new User-Based Security Model
(USM) veiw with Object ID components larger than 255. With ths update, snmpd is able to create new
USM views with all valid OIDs.
1494
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=504742
1495
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=507528
1496
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=514703
1497
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=518633
1498
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=515650
1499
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=521175
1500
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=521820
1501
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=523249
1502
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=527364
1496
(BZ#514703 )
1497
,
)
(BZ#523249
1502
(BZ#527364
RHBA-2010:0253: bug fix and enhancement update
(BZ#504742
1495
(BZ#507528 )
1501
)
)
1494
)
1500
(BZ#521820 )
177