5 - RHSA-2013:0657

Problem Description:

Updated openstack-nova packages that fix two security issues, several bugs, and add an enhancement are now available for Red Hat OpenStack Folsom.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

2. Relevant releases/architectures:

OpenStack Folsom - noarch

3. Description:

The openstack-nova packages provide OpenStack Compute (code name Nova), which provides services for provisioning, managing, and using virtual machine instances.

A denial of service flaw was found in the Extensible Markup Language (XML) parser used by Nova. A remote attacker could use this flaw to send a specially-crafted request to a Nova API, causing Nova to consume an excessive amount of CPU and memory. (CVE-2013-1664)

A flaw was found in the XML parser used by Nova. If a remote attacker sent a specially-crafted request to a Nova API, it could cause Nova to connect to external entities, causing a large amount of system load, or allow an attacker to read files on the Nova server that are accessible to the user running Nova. (CVE-2013-1665)

This update also fixes several bugs. The following are noteworthy changes:

* In single node, all-in-one environments where all services (such as Nova, Glance, and Keystone) are installed and run on a single system, after a host reboot, some instances may have automatically started again, but soon after, automatically shut down. "Instance shutdown by itself. Calling the stop API" messages were logged to Nova logs (in "/var/log/nova/") in these cases. (BZ#890512)

* In environments using Quantum, after creating a network with two subnets, removing an IP address (using "nova remove-fixed-ip"), and then adding a fixed address (using "nova add-fixed-ip"), resulted in the virtual machine having two IP addresses. (BZ#908373)

* Prior to this update, after converting a downloaded image to raw, the original, downloaded image (a large .part file) was not removed. After installing this update, the following three options must be configured in "/etc/nova/nova.conf" to correctly resolve this issue:

remove_unused_base_images=true remove_unused_resized_minimum_age_seconds=60 remove_unused_original_minimum_age_seconds=60

(BZ#911103)

Additionally, this update adds the following enhancement:

* The RHSA-2013:0658 openstack-cinder update implemented a Cinder driver that allows Red Hat Storage to be used as a back-end for Cinder volumes. This update adds a libvirt connector to Nova, which is a requirement for using the new Cinder driver. Note that you must manually install the glusterfs and glusterfs-fuse packages on the Nova nodes.

Additionally, when running Security-Enhanced Linux (SELinux) in Enforcing mode, the latest selinux-policy packages provided by RHBA-2013:0618 must be installed, otherwise denials will be logged when attempting to mount Red Hat Storage volumes. (BZ#912384)

All users of openstack-nova are advised to upgrade to these updated packages, which correct these issues and add this enhancement. After installing the updated packages, the Nova running services will be restarted automatically.

4. Solution:

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

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258

5. Bugs fixed (http://bugzilla.redhat.com/):

889868 - dnsmasq DHCP request blocked by default firewall rules 890512 - Some Instances are shutoff after host reboot 891347 - Use fallocate when copying disk images around in _base to improve copy performance and out of space errors 891420 - Change default for compute node to poll for database connection indefinitely 902409 - Network disassociation from a project doesn't work 905113 - Backport qpid_hosts option - nova 906783 - Quantum/Nova does not work with nova.virt.firewall.NoopFirewallDriver 907178 - Deletion of the "default" security group fails without error 908373 - Quantum: adding fixed ip to an instance on a network with two subnets using NOVA will results with two ip address 910224 - CVE-2013-1664 CVE-2013-1665 OpenStack nova: XML entity parsing 911103 - libvirt leaves large stale .part files on disk when downloading non raw images 912384 - Backport GlusterFS connector from Grizzly 912982 - CVE-2013-1665 Python xml bindings: External entity expansion in Python XML libraries inflicts potential security flaws and DoS vulnerabilities 913613 - Some Instances are shutoff after they're suspended externally to nova 913808 - CVE-2013-1664 Python xml bindings: Internal entity expansion in Python XML libraries inflicts DoS vulnerabilities 914759 - nova-dhcpbridge does not support nova.conf and nova-dist.conf at the same time 916241 - nova-dhcpbridge fails to startup