10 - RHSA-2005:373

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 3 - i386, ia64, ppc, s390, s390x, x86_64 Red Hat Desktop version 3 - i386, x86_64 Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64 Red Hat Enterprise Linux WS version 3 - 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 which 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 which 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:
- snmpwalk no longer hangs when a non-existant pid is listed.
- snmpd no longer segfaults due to incorrect handling of lmSensors.
- an incorrect assignment leading to invalid values in ASN mibs has been
fixed.
- on systems running a 64-bit kernel, the values in /proc/net/dev no
longer become too large to fit in a 32-bit object.
- the net-snmp-devel packages correctly depend on elfutils-libelf-devel.
- large file systems are correctly handled
- snmp daemon now reports gigabit Ethernet speeds correctly
- fixed consistency between IP adresses and hostnames in configuration file

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/):

130252 - net-snmp-devel should depend on elfutils-libelf-devel 152448 - snmpd.conf hostname vs. IP inconsistancy 154455 - 64bit network counters peg instead of wrapping 162907 - CAN-2005-2177 net-snmp denial of service 164639 - CAN-2005-1740 net-snmp insecure temporary file usage