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AUSCERT External Security Bulletin Redistribution
Moderate: openstack-nova security and bug fix update
5 April 2013
AusCERT Security Bulletin Summary
Publisher: Red Hat
Operating System: Red Hat
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Existing Account
Unauthorised Access -- Existing Account
CVE Names: CVE-2013-1838 CVE-2013-0335
Comment: This advisory references vulnerabilities in products which run on
platforms other than Red Hat. It is recommended that administrators
running openstack-nova check for an updated version of the software
for their operating system.
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Red Hat Security Advisory
Synopsis: Moderate: openstack-nova security and bug fix update
Advisory ID: RHSA-2013:0709-01
Product: Red Hat OpenStack
Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-0709.html
Issue date: 2013-04-04
CVE Names: CVE-2013-0335 CVE-2013-1838
Updated openstack-nova packages that fix two security issues and various
bugs 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
The openstack-nova packages provide OpenStack Compute (code name Nova),
which provides services for provisioning, managing, and using virtual
A flaw was found in the way the Nova VNC proxy handled console tokens. In
some cases, a console token that was valid for one virtual machine could
be used to connect to the console of a different user's virtual machine.
Note that this flaw did not bypass the normal user name and password
authentication on the virtual machine. The attacker would need to know
valid credentials to log into the virtual machine. (CVE-2013-0335)
There was no limit on the number of fixed IP addresses a virtual machine
could be assigned with. This could lead to a denial of service if an
attacker assigned all available IP addresses to their virtual machine. With
this update, a default limit of 10 IP addresses per virtual machine is
enforced. The "quota_fixed_ips" option in "/etc/nova/nova.conf" can be
used to set a higher or lower limit. (CVE-2013-1838)
Red Hat would like to thank the OpenStack project for reporting these
issues. Upstream acknowledges Loganathan Parthipan (HP) and Rohit Karajgi
(NTT Data) as the original, independent reporters of CVE-2013-0335, and
Vish Ishaya (Nebula) as the original reporter of CVE-2013-1838.
This update also fixes various bugs in the openstack-nova packages.
All users of openstack-nova are advised to upgrade to these updated
packages, which correct these issues. After installing the updated
packages, the running Nova services will be restarted automatically.
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
5. Bugs fixed (http://bugzilla.redhat.com/):
887968 - RFE: Configurable hardware models for disk/nic based manual user input
891349 - Multi-process launching issue
910727 - Cannot spawn new machines. The scheduler.log says TypeError: can't compare datetime.datetime to NoneType
912284 - with resume_guests_state_on_host_boot=True rebooting host leaves VM's in Error state
915274 - Attempting to 'nova live-migrate' to a non-existing host, it fails, & the instance remains in a perpetual state of MIGRATING
915586 - CVE-2013-0335 OpenStack nova: VNC proxy can connect to the wrong VM
916174 - wrong quota_usages updated when admin deletes instance of common use
916176 - Add a namespace prefix to glance hardware properties used by libvirt
916615 - "preallocate_images" config directive should be added to nova.conf
917534 - Nova: SELinux AVC Errors for "iptables-save" / "iptables-restor".
919648 - CVE-2013-1838 Openstack Nova: DoS by allocating all Fixed IPs
6. Package List:
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <firstname.lastname@example.org>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2013 Red Hat, Inc.
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