RHSA-2016:0017 - Security Advisory

Topic

Updated openstack-nova packages that fix two security issues are now
available for Red Hat Enterprise Linux OpenStack Platform 5.0 for Red
Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having Important 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 and
controlling access through users and projects.

A flaw was discovered in the OpenStack Compute (nova) snapshot feature when
using the libvirt driver. A compute user could overwrite an attached
instance disk with a malicious header specifying a backing file, and then
request a snapshot, causing a file from the compute host to be leaked. This
flaw only affects LVM or Ceph setups, or setups using filesystem storage
with "use_cow_images = False". (CVE-2015-7548)

A vulnerability was discovered in the way OpenStack Compute (nova)
networking handled security group updates; changes were not applied to
already running VM instances. A remote attacker could use this flaw to
access running VM instances. (CVE-2015-7713)

The CVE-2015-7548 issue was discovered by Matthew Booth of Red Hat
OpenStack Engineering.

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.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat OpenStack 5.0 for RHEL 6 x86_64

Fixes

• BZ - 1269119 - CVE-2015-7713 openstack-nova: network security group changes are not applied to running instances
• BZ - 1290511 - CVE-2015-7548 openstack-nova: Unprivileged API user can access host data using instance snapshot

CVEs

• CVE-2015-7548
• CVE-2015-7713

References

• http://www.redhat.com/security/updates/classification/#normal