RHSA-2016:0018 - Security Advisory

Topic

Updated openstack-nova packages that fix one security issue are now
available for Red Hat Enterprise Linux OpenStack Platform 5.0, 6.0,
and 7.0 for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Important security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link 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)

This 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 this issue.

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 7 x86_64
• Red Hat OpenStack 6.0 x86_64
• Red Hat OpenStack 5.0 for RHEL 7 x86_64

Fixes

• BZ - 1290511 - CVE-2015-7548 openstack-nova: Unprivileged API user can access host data using instance snapshot

CVEs

• CVE-2015-7548

References

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