Scientific Linux Security Update : pacemaker on SL7.x x86_64

This script is Copyright (C) 2015 Tenable Network Security, Inc.


Synopsis :

The remote Scientific Linux host is missing one or more security
updates.

Description :

A flaw was found in the way pacemaker, a cluster resource manager,
evaluated added nodes in certain situations. A user with read-only
access could potentially assign any other existing roles to themselves
and then add privileges to other users as well. (CVE-2015-1867)

The pacemaker packages have been upgraded to upstream version 1.1.13,
which provides a number of bug fixes and enhancements over the
previous version.

This update also fixes the following bugs :

- When a Pacemaker cluster included an Apache resource,
and Apache's mod_systemd module was enabled, systemd
rejected notifications sent by Apache. As a consequence,
a large number of errors in the following format
appeared in the system log :

Got notification message from PID XXXX, but reception only permitted
for PID YYYY

With this update, the lrmd daemon now unsets the 'NOTIFY_SOCKET'
variable in the described circumstances, and these error messages are
no longer logged.

- Previously, specifying a remote guest node as a part of
a group resource in a Pacemaker cluster caused the node
to stop working. This update adds support for remote
guests in Pacemaker group resources, and the described
problem no longer occurs.

- When a resource in a Pacemaker cluster failed to start,
Pacemaker updated the resource's last failure time and
incremented its fail count even if the 'on-fail=ignore'
option was used. This in some cases caused unintended
resource migrations when a resource start failure
occurred. Now, Pacemaker does not update the fail count
when 'on-fail=ignore' is used. As a result, the failure
is displayed in the cluster status output, but is
properly ignored and thus does not cause resource
migration.

- Previously, Pacemaker supported semicolon characters
(';') as delimiters when parsing the pcmk_host_map
string, but not when parsing the pcmk_host_list string.
To ensure consistent user experience, semicolons are now
supported as delimiters for parsing pcmk_host_list, as
well.

In addition, this update adds the following enhancements :

- If a Pacemaker location constraint has the
'resource-discovery=never' option, Pacemaker now does
not attempt to determine whether a specified service is
running on the specified node. In addition, if multiple
location constraints for a given resource specify
'resource- discovery=exclusive', then Pacemaker attempts
resource discovery only on the nodes specified in those
constraints. This allows Pacemaker to skip resource
discovery on nodes where attempting the operation would
lead to error or other undesirable behavior.

- The procedure of configuring fencing for redundant power
supplies has been simplified in order to prevent
multiple nodes accessing cluster resources at the same
time and thus causing data corruption. For further
information, see the 'Fencing: Configuring STONITH'
chapter of the High Availability Add-On Reference
manual.

- The output of the 'crm_mon' and 'pcs_status' commands
has been modified to be clearer and more concise, and
thus easier to read when reporting the status of a
Pacemaker cluster with a large number of remote nodes
and cloned resources.

See also :

http://www.nessus.org/u?bae9522e

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 87568 ()

Bugtraq ID:

CVE ID: CVE-2015-1867

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