RHSA-2009:1341 - Security Advisory

Topic

Updated cman packages that fix several security issues, various bugs, and
add enhancements are 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 Cluster Manager (cman) utility provides services for managing a Linux
cluster.

Multiple insecure temporary file use flaws were found in fence_apc_snmp and
ccs_tool. A local attacker could use these flaws to overwrite an arbitrary
file writable by a victim running those utilities (typically root) with
the output of the utilities via a symbolic link attack. (CVE-2008-4579,
CVE-2008-6552)

Bug fixes:

• a buffer could overflow if cluster.conf had more than 52 entries per

block inside the <cman> block. The limit is now 1024.

• the output of the group_tool dump subcommands were NULL padded.
• using device="" instead of label="" no longer causes qdiskd to

incorrectly exit.

• the IPMI fencing agent has been modified to time out after 10 seconds. It

is also now possible to specify a different timeout value with the '-t'
option.

• the IPMI fencing agent now allows punctuation in passwords.
• quickly starting and stopping the cman service no longer causes the

cluster membership to become inconsistent across the cluster.

• an issue with lock syncing caused 'receive_own from' errors to be logged

to '/var/log/messages'.

• an issue which caused gfs_controld to segfault when mounting hundreds of

file systems has been fixed.

• the LPAR fencing agent now properly reports status when an LPAR is in

Open Firmware mode.

• the LPAR fencing agent now works properly with systems using the

Integrated Virtualization Manager (IVM).

• the APC SNMP fencing agent now properly recognizes outletStatusOn and

outletStatusOff return codes from the SNMP agent.

• the WTI fencing agent can now connect to fencing devices with no

password.

• the rps-10 fencing agent now properly performs a reboot when run with no

options.

• the IPMI fencing agent now supports different cipher types with the '-C'

option.

• qdisk now properly scans devices and partitions.
• cman now checks to see if a new node has state to prevent killing the

first node during cluster setup.

• 'service qdiskd start' now works properly.
• the McData fence agent now works properly with the McData Sphereon 4500

Fabric Switch.

• the Egenera fence agent can now specify an SSH login name.
• the APC fence agent now works with non-admin accounts when using the

3.5.x firmware.

• fence_xvmd now tries two methods to reboot a virtual machine.
• connections to OpenAIS are now allowed from unprivileged CPG clients with

the user and group of 'ais'.

• groupd no longer allows the default fence domain to be '0', which

previously caused rgmanager to hang. Now, rgmanager no longer hangs.

• the RSA fence agent now supports SSH enabled RSA II devices.
• the DRAC fence agent now works with the Integrated Dell Remote Access

Controller (iDRAC) on Dell PowerEdge M600 blade servers.

• fixed a memory leak in cman.
• qdisk now displays a warning if more than one label is found with the

same name.

• the DRAC5 fencing agent now shows proper usage instructions for the '-D'

option.

• cman no longer uses the wrong node name when getnameinfo() fails.
• the SCSI fence agent now verifies that sg_persist is installed.
• the DRAC5 fencing agent now properly handles modulename.
• QDisk now logs warning messages if it appears its I/O to shared storage

is hung.

• fence_apc no longer fails with a pexpect exception.
• removing a node from the cluster using 'cman_tool leave remove' now

properly reduces the expected_votes and quorum.

• a semaphore leak in cman has been fixed.
• 'cman_tool nodes -F name' no longer segfaults when a node is out of

membership.

Enhancements:

• support for: ePowerSwitch 8+ and LPAR/HMC v3 devices, Cisco MDS 9124 and

MDS 9134 SAN switches, the virsh fencing agent, and broadcast communication
with cman.

• fence_scsi limitations added to fence_scsi man page.

Users of cman are advised to upgrade to these updated packages, which
resolve these issues and add 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 Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 276541 - fence_impilan blocks alternative fencing agents when connectivity to IPMI fails.
• BZ - 322291 - rps-10 fence agent does not perform default reboot action
• BZ - 447497 - RFE: support for IPMI v2.0 ciphersuites in fence_ipmilan
• BZ - 447964 - fence_ipmilan does not handle punctuation in password
• BZ - 467386 - CVE-2008-4579 cman/fence: insecure temporary file usage in the apc fence agents
• BZ - 468966 - Possible buffer overflow in cman config loader can lead to memory corruption
• BZ - 472460 - cman_tool nodes -F name segfaults when a node is out of membership
• BZ - 472786 - cluster view inconsistent after "service cman stop; service cman start"
• BZ - 473961 - clvmd memory leak
• BZ - 474163 - gfs_controld: receive_own from N messages with plock_ownership enabled
• BZ - 480178 - fence_xvmd Fails to Reboot VM
• BZ - 480401 - gfs_controld segfault during multiple mount attempt
• BZ - 480836 - [RFE] Add support for Cisco 9124 and 9134 SAN switches as fence devices
• BZ - 481566 - [PATCH] /sbin/fence_lpar - properly report status on systems in Open Firmware
• BZ - 481664 - fence_wti is unable to connect to (password-less) fencing device
• BZ - 484095 - fence_apc_snmp: invalid status outletStatusOff
• BZ - 484956 - qdiskd does not prune partitions mapped to dm-mpio devices
• BZ - 485026 - Cman kills first node in initial cluster setup
• BZ - 485199 - 'service qdiskd restart' doesn't work
• BZ - 485469 - Normal users cannot run CPG clients if openais is started by cman.
• BZ - 485700 - fence_lpar doesn't work with hmc version 3
• BZ - 487436 - Qdisk should choose first disk if multiple disks containing same label exist
• BZ - 487501 - Exceptions in fencing agents
• BZ - 488565 - cman uses local node name for lookup during start up
• BZ - 488958 - GFS: Allow fence_egenera to specify ssh login name
• BZ - 491640 - APC Fence Agent does not work with non-admin account
• BZ - 493165 - group_tool ls fence returns one for fence id ZERO
• BZ - 493207 - groupd assigns zero group id
• BZ - 493802 - [RFE] Providing support for ssh enabled RSA II fence devices
• BZ - 496629 - [RFE] Include fence_virsh along with the present agents
• BZ - 496724 - fence_drac5 uses module_name instead of modulename
• BZ - 498329 - fence_drac5 help output shows incorrect usage
• BZ - 499767 - groupd segfaults on start
• BZ - 500450 - qdiskd I/O hang reporting
• BZ - 500567 - Flag added to openais to report security errors causes cman not to build
• BZ - 501586 - fence agents (fence_apc, fence_wti) fails with pexpect exception
• BZ - 502674 - fence_lpar can't log in to IVM systems
• BZ - 504705 - fence_lpar: lssyscfg command on HMC can take longer than SHELL_TIMEOUT
• BZ - 505258 - cman_tool leave remove does not reduce quorum
• BZ - 505594 - semaphore leak during cluster startup/shutdown cycle
• BZ - 512998 - Fence_scsi limitations man page fix needed
• BZ - 514758 - [RHEL5][cman] fence_apc_snmp: local variable 'verbose_filename' referenced before assignment
• BZ - 519436 - CVE-2008-6552 cman, gfs2-utils, rgmanager: multiple insecure temporary file use issues

CVEs

• CVE-2008-6552
• CVE-2008-4579

References

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