10 - RHSA-2005:395

Problem Description:

Updated net-snmp packages that fix two security issues and various bugs are now available.

This update has been rated as having low security impact by the Red Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64 Red Hat Enterprise Linux Desktop version 4 - i386, x86_64 Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64 Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

3. Problem description:

SNMP (Simple Network Management Protocol) is a protocol used for network management.

A denial of service bug was found in the way net-snmp uses network stream protocols. It is possible for a remote attacker to send a net-snmp agent a specially crafted packet that will crash the agent. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-2177 to this issue.

An insecure temporary file usage bug was found in net-snmp's fixproc command. It is possible for a local user to modify the content of temporary files used by fixproc that can lead to arbitrary command execution. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2005-1740 to this issue.

Additionally, the following bugs have been fixed: - - The lmSensors are correctly recognized, snmp deamon no longer segfaults - - The larger swap partition sizes are correctly reported - - Querying hrSWInstalledLastUpdateTime no longer crashes the snmp deamon - - Fixed error building ASN.1 representation - - The 64-bit network counters correctly wrap - - Large file systems are correctly handled - - Snmptrapd initscript correctly reads options from its configuration
file /etc/snmp/snmptrapd.options - - Snmp deamon no longer crashes when restarted using the agentX
protocol - - snmp daemon now reports gigabit Ethernet speeds correctly - - MAC adresses are shown when requested instead of IP adresses

All users of net-snmp should upgrade to these updated packages, which resolve these issues.

4. Solution:

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

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those RPMs which are currently installed will be updated. Those RPMs which are not installed but included in the list will not be updated. Note that you can also use wildcards (*.rpm) if your current directory *only* contains the desired RPMs.

Please note that this update is also available via Red Hat Network. Many people find this an easier way to apply updates. To use Red Hat Network, launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate RPMs being upgraded on your system.

If up2date fails to connect to Red Hat Network due to SSL Certificate Errors, you need to install a version of the up2date client with an updated certificate. The latest version of up2date is available from the Red Hat FTP site and may also be downloaded directly from the RHN website:

https://rhn.redhat.com/help/latest-up2date.pxt

5. Bug IDs fixed (http://bugzilla.redhat.com/):

150084 - snmpd dies when getting enterprises.ucdavis.memory.memTotalSwap.0 150199 - snmpd exits without a diagnostic: SIGSEGV 154455 - 64bit network counters peg instead of wrapping 154798 - /etc/init.d/snmptrapd wrong order in setting variables... 155038 - x86_64: net-snmp dies when querying hrSWInstalledLastUpdateTime 158769 - CAN-2005-1740 net-snmp insecure temporary file usage 163688 - CAN-2005-2177 net-snmp denial of service