RHSA-2014:0366 - Security Advisory

Topic

Updated openstack-nova packages that fix three security issues and one bug
are now available for Red Hat Enterprise Linux OpenStack Platform 3.0.

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.

Description

OpenStack Compute (nova) launches and schedules large networks of virtual
machines, creating a redundant and scalable cloud computing platform.
Compute provides the software, control panels, and APIs required to
orchestrate a cloud, including running virtual machine instances, managing
networks, and controlling access through users and projects.

A flaw was found in the way the libvirt driver handled short-lived disk
back-up files on Compute nodes. An authenticated attacker could use this
flaw to create a large number of such files, exhausting all available space
on Compute node disks, and potentially causing a denial of service.
Note that only Compute setups using the libvirt driver were affected.
(CVE-2013-7048)

It was discovered that the libvirt driver did not properly handle live
migration of virtual machines. An authenticated attacker could use this
flaw to gain access to a snapshot of a migrated virtual machine. Note that
only setups using KVM live block migration were affected. (CVE-2013-7130)

It was found that OpenStack Compute did not properly reapply existing
security groups after migrating or resizing a virtual machine. This could
cause virtual machine instances to be unintentionally exposed on the
network. Note that only setups using the XenAPI back end were affected.
(CVE-2013-4497)

Red Hat would like to thank the OpenStack Project for reporting
CVE-2013-7130. Upstream acknowledges Loganathan Parthipan as the original
reporter of CVE-2013-7130.

This update also fixes the following bug:

• Prior to this update, the cache mechanism did not consider existing

network interfaces when building the nework list. After any change in the
network interfaces, only the interface modified last was shown when listing
or getting the details of an instance. With this update, the cache
mechanism considers all existing instances when it is being refreshed.
(BZ#1038239)

All openstack-nova users are advised to upgrade to these updated packages,
which correct these issues.

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/site/articles/11258

Affected Products

• Red Hat OpenStack grizzly x86_64

Fixes

• BZ - 1026171 - CVE-2013-4497 openstack-nova: XenAPI security groups not kept through migrate or resize
• BZ - 1038239 - nova interface-attach causes existing networks to be shown as replaced by new one when "nova show" is run
• BZ - 1040786 - CVE-2013-7048 Openstack Nova: insecure directory permissions in snapshots
• BZ - 1055400 - CVE-2013-7130 OpenStack nova: Live migration can leak root disk into ephemeral storage

CVEs

• CVE-2013-7130
• CVE-2013-7048
• CVE-2013-4497

References

• https://access.redhat.com/security/updates/classification/#moderate