RHSA-2009:1339 - Security Advisory

Topic

An updated rgmanager package that fixes multiple security issues, various
bugs, and adds enhancements is now available for Red Hat Enterprise Linux
5.

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

Description

The rgmanager package contains the Red Hat Resource Group Manager, which
provides high availability for critical server applications in the event of
system downtime.

Multiple insecure temporary file use flaws were discovered in rgmanager and
various resource scripts run by rgmanager. A local attacker could use these
flaws to overwrite an arbitrary file writable by the rgmanager process
(i.e. user root) with the output of rgmanager or a resource agent via a
symbolic link attack. (CVE-2008-6552)

This update also fixes the following bugs:

• clulog now accepts '-' as the first character in messages.
• if expire_time is 0, max_restarts is no longer ignored.
• the SAP resource agents included in the rgmanager package shipped with

Red Hat Enterprise Linux 5.3 were outdated. This update includes the most
recent SAP resource agents and, consequently, improves SAP failover
support.

• empty PID files no longer cause resource start failures.
• recovery policy of type 'restart' now works properly when using a

resource based on ra-skelet.sh.

• samba.sh has been updated to kill the PID listed in the proper PID file.
• handling of the '-F' option has been improved to fix issues causing

rgmanager to crash if no members of a restricted failover domain were
online.

• the number of simultaneous status checks can now be limited to prevent

load spikes.

• forking and cloning during status checks has been optimized to reduce

load spikes.

• rg_test no longer hangs when run with large cluster configuration files.
• when rgmanager is used with a restricted failover domain it will no

longer occasionally segfault when some nodes are offline during a failover
event.

• virtual machine guests no longer restart after a cluster.conf update.
• nfsclient.sh no longer leaves temporary files after running.
• extra checks from the Oracle agents have been removed.
• vm.sh now uses libvirt.
• users can now define an explicit service processing order when

central_processing is enabled.

• virtual machine guests can no longer start on 2 nodes at the same time.
• in some cases a successfully migrated virtual machine guest could restart

when the cluster.conf file was updated.

• incorrect reporting of a service being started when it was not started

has been addressed.

As well, this update adds the following enhancements:

• a startup_wait option has been added to the MySQL resource agent.
• services can now be prioritized.
• rgmanager now checks to see if it has been killed by the OOM killer and

if so, reboots the node.

Users of rgmanager are advised to upgrade to this updated package, which
resolves these issues and adds these enhancements.

Solution

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

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux High Availability for x86_64 5 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 5 ppc
• Red Hat Enterprise Linux High Availability for x86_64 5 ia64
• Red Hat Enterprise Linux High Availability for x86_64 5 i386
• Red Hat Enterprise Linux High Availability (for RHEL Server) from RHUI 5 x86_64
• Red Hat Enterprise Linux High Availability (for RHEL Server) from RHUI 5 i386

Fixes

• BZ - 250718 - fs.sh inefficient scripting leads to load peaks and disk saturation
• BZ - 412911 - Convert all XM management calls to either lib virt or virsh
• BZ - 449394 - Recovery policy of type restart doesn't work with a service using a resource based on ra-skelet.sh
• BZ - 468691 - Virtual Services guest can start on 2 nodes at same time
• BZ - 470917 - The oracledb.sh script checks in strange intervals(10s, 5m, 4.5m)
• BZ - 471066 - rgmanager oracledb.sh resource agent does not properly check for all db startup failures.
• BZ - 471226 - oracledb.sh script kills ALL oracle instances when failing over
• BZ - 471431 - second ocf_log message doesn't make it to /var/log/messages
• BZ - 474444 - Zero-length pid files cause resource start failures
• BZ - 475826 - Update support for SAP resource agents (rgmanager)
• BZ - 481058 - MySQL Service Startup Timeout after Crash
• BZ - 482858 - Cluster Event Script needs Updates to include Group Exclusive
• BZ - 483093 - rgmanager: samba.sh tries to kill the wrong pid file
• BZ - 486349 - nfsclient.sh leaves temporary files /tmp/nfsclient-status-cache-$$
• BZ - 486717 - clusvcadm -e <service> -F handling bugs
• BZ - 488714 - Enabling (according to failover domain rules) a frozen service results in a unusable failed+frozen service
• BZ - 489785 - /usr/share/cluster/apache.sh does not handle a valid /etc/httpd/conf/httpd.conf configuration correctly
• BZ - 490449 - domU's restart after cluster.conf update
• BZ - 490455 - rg_test hangs when running against cluster
• BZ - 492828 - RFE: priorities for services/virtual machines
• BZ - 494977 - segfault in check_rdomain_crash() during failover
• BZ - 505340 - VM migration and subsequent cluster.conf update can cause the VM restart
• BZ - 514044 - vm.sh does will fail resource if "no state" is detected
• BZ - 519436 - CVE-2008-6552 cman, gfs2-utils, rgmanager: multiple insecure temporary file use issues

CVEs

• CVE-2008-6552

References

• http://www.redhat.com/security/updates/classification/#low