The (1) fence_apc and (2) fence_apc_snmp programs, as used in (a) fence 2.02.00-r1 and possibly (b) cman, when running in verbose mode, allows local users to append to arbitrary files via a symlink attack on the apclog temporary file.

The remote Oracle Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2009-1341 advisory.

    [2.0.115-1]
    - RSA II fencing agent has been fixed.
    - Resolves: rhbz#493802

    [2.0.114-1]
    - local variable 'verbose_filename' referenced before assignment has been fixed
    - RSA II fencing agent has been fixed.
    - Resolves: rhbz#493802 rhbz#514758

    [2.0.113-1]
    - Limitations with 2-node fence_scsi are now properly documented in the man       page.
    - Resolves: rhbz#512998

    [2.0.112-1]
    - The pexpect exception is now properly checked in fence agents.
    - Resolves: rhbz#501586

    [2.0.111-1]
    - cman_tool leave remove does now properly reduces quorum.
    - Resolves: rhbz#505258

    [2.0.110-1]
    - Updated fence_lpar man page to remove options that do not yet exist.
    - Resolves: rhbz#498045

    [2.0.108-1]
    - A semaphore leak in cman has been fixed.
    - Resolves: rhbz#505594

    [2.0.107-1]
    - Added man page for lpar fencing agent (fence_lpar).
    - Resolves: rhbz#498045

    [2.0.106-1]
    - The lssyscfg command can take longer than the shell timeout which will       cause fencing to fail, we now wait longer for the lssyscfg command to       complete.
    - Resolves: rhbz#504705

    [2.0.105-1]
    - The fencing agents no longer fail with pexpect exceptions.
    - Resolves: rhbz#501586

    [2.0.104-1]
    - Broadcast communcations are now possible with cman
    - fence_lpar can now login to IVM systems
    - Resolves: rhbz#502674 rhbz#492808

    [2.0.103-1]
    - fence_apc no longer fails with a pexpect exception
    - symlink vulnerabilities in fance_apc_snmp were fixed
    - The virsh fencing agent was added.
    - Resolves: rhbz#496629 rhbz#498952 rhbz#501586

    [2.0.102-1]
    - Correct return code is checked during disk scanning check.
    - Resolves: rhbz#484956

    [2.0.101-1]
    - The SCSI fence agent now verifies that sg_persist is installed properly.
    - The DRAC5 fencing agent now properly handles a modulename.
    - QDisk now logs warning messages if it appears it's I/O to shared storage       is hung.
    - Resolves: rhbz#496724 rhbz#500450 rhbz#500567

    [2.0.100-1]
    - Support has been added for ePowerSwitch 8+ devices
    - cluster.conf files can now have more than 52 entries inside a block inside     [block]
    - The output of the group_tool dump sub commands are no longer NULL padded.
    - Using device='' instead of label='' no longer causes qdiskd to incorrectly       exit
    - The IPMI fencing agent has been modified to timeout after 10 seconds.  It is       also now possible to specify a different timeout with the '-t' option.
    - The IPMI fencing agent now allows punctuation in the password
    - Quickly starting and stopping the cman service no longer causes the cluster       membership to become inconsistent across the cluster
    - An issue with lock syncing causing 'receive_own from ...' errors in syslog       has been fixed
    - An issue which caused gfs_controld to segfault when mounting hundreds of       filesystems has been fixed
    - The LPAR fencing agent now properly reports status when an LPAR is in       Open Firmware
    - The APC SNMP fencing agent now properly recognizes outletStatusOn and       outletStatusOff returns codes from the SNMP agent
    - 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
    - Added support for LPAR/HMC v3
    - 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 Sphereon 4500 model
    - The Egenera fence agent can now specify an ssh login name
    - APC Fence agent works with non-admin accounts with firmware 3.5.x
    - fence_xvmd now tries two methods to reboot a virtual machine
    - Connections to openais are now allowed from unprivileged CPG clients with       user and group of 'ais'
    - Support has been added for Cisco 9124/9134 SAN switches
    - groupd no longer allows the default fence domain to be '0' which would cause       rgmanager to hang
    - The RSA fence agent now supports ssh enabled RSA II devices
    - DRAC fence agent now works with iDRAC on the Dell M600 Blade Chassis
    - fence_drac5 now shows proper usage instructions
    - cman no longer uses the wrong node name when getnameinfo() fails
    - The SCSI fence agent now verifies that sg_persist is installed properly
    - Resolves: rhbz#467112 rhbz#468966 rhbz#470318 rhbz#276541 rhbz#447964 rhbz#472786 rhbz#474163     rhbz#480401 rhbz#481566 rhbz#484095 rhbz#481664 rhbz#322291 rhbz#447497 rhbz#484956 rhbz#485700     rhbz#485026 rhbz#485199 rhbz#470983 rhbz#488958 rhbz#487501 rhbz#491640 rhbz#480178 rhbz#485469     rhbz#480836 rhbz#493207 rhbz#493802 rhbz#462390 rhbz#498329 rhbz#488565 rhbz#499871

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 5 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2009:1341 advisory.

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Insecure temporary file use flaws were found in fence_egenera, fence_apc, and fence_apc_snmp. A local attacker could use these flaws to overwrite an arbitrary file writable by the victim running those utilities via a symbolic link attack. (CVE-2008-4192, CVE-2008-4579)

This update also fixes the following bugs :

  - fence_apc_snmp now waits for five seconds after fencing     to properly get status. (BZ#494587)

  - The fence_drac5 help output now shows the proper     commands. (BZ#498870)

  - fence_scsi_test.pl now verifies that sg_persist is in     the path before running. (BZ#500172)

  - fence_drac5 is now more consistent with other agents and     uses module_name instead of modulename. (BZ#500546)

  - fence_apc and fence_wti no longer fail with a pexpect     exception. (BZ#501890, BZ#504589)

  - fence_wti no longer issues a traceback when an option is     missing. (BZ#508258)

  - fence_sanbox2 is now able to properly obtain the status     after fencing. (BZ#510279)

  - Fencing no longer fails if fence_wti is used without     telnet. (BZ#510335)

  - fence_scsi get_scsi_devices no longer hangs with various     devices. (BZ#545193)

  - fence_ilo no longer fails to reboot with ilo2 firmware     1.70. (BZ#545682)

  - Fixed an issue with fence_ilo not rebooting in some     implementations. (BZ#576036)

  - fence_ilo no longer throws exceptions if the user does     not have power privileges. (BZ#576178)

As well, this update adds the following enhancements :

  - Support has been added for SSH-enabled RSA II fence     devices. (BZ#476161)

  - The APC fence agent will now work with a non-root     account. (BZ#491643)

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.

NOTE: openais and pexpect updates are required.

The remote host is affected by the vulnerability described in GLSA-201009-09 (fence: Multiple symlink vulnerabilities)

    The fence_apc, fence_apc_snmp (CVE-2008-4579) and fence_manual     (CVE-2008-4580) programs contain symlink vulnerabilities.
  Impact :

    These vulnerabilities may allow arbitrary files to be overwritten with     root privileges.
  Workaround :

    There is no known workaround at this time.

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.

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.

Multiple insecure temporary file handling vulnerabilities were discovered in Red Hat Cluster. A local attacker could exploit these to overwrite arbitrary local files via symlinks. (CVE-2008-4192, CVE-2008-4579, CVE-2008-4580, CVE-2008-6552)

It was discovered that CMAN did not properly handle malformed configuration files. An attacker could cause a denial of service (via CPU consumption and memory corruption) in a node if the attacker were able to modify the cluster configuration for the node. (CVE-2008-6560).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update includes security fixes for: CVE-2008-4192 CVE-2008-4579 among many other upstream bug fixes.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
181082	Oracle Linux 5 : cman (ELSA-2009-1341)	Nessus	Oracle Linux Local Security Checks	medium
63894	RHEL 5 : cman (RHSA-2009:1341)	Nessus	Red Hat Local Security Checks	medium
60958	Scientific Linux Security Update : fence on SL4.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	medium
60650	Scientific Linux Security Update : cman on SL5.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	medium
49732	GLSA-201009-09 : fence: Multiple symlink vulnerabilities	Nessus	Gentoo Local Security Checks	high
43788	CentOS 5 : cman (CESA-2009:1341)	Nessus	CentOS Local Security Checks	medium
43368	Ubuntu 6.06 LTS / 8.04 LTS / 8.10 : redhat-cluster, redhat-cluster-suite vulnerabilities (USN-875-1)	Nessus	Ubuntu Local Security Checks	high
34482	Fedora 9 : cman-2.03.08-1.fc9 / gfs2-utils-2.03.08-1.fc9 / rgmanager-2.03.08-1.fc9 (2008-9042)	Nessus	Fedora Local Security Checks	medium

Detections

Analytics

CVE-2008-4579

high

Tenable Plugins

medium

medium

medium

medium

high

medium

high

medium