RHSA-2016:0363 - Security Advisory

Topic

Updated openstack-nova packages that fix one security issue are now
available for Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo)
for RHEL 7.

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.

[Updated March 14, 2016]
The original packages distributed with this advisory contained a bug that
could cause failures with non-disk image backends. We have updated all
packages to correct the bug.

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.

An information-exposure flaw was found in the OpenStack Compute (nova)
resize and migrate functionality. An authenticated user could write a
malicious qcow header to an ephemeral or root disk, referencing a block
device as a backing file. With a subsequent resize or migration, file
system content on the specified device would be leaked to the user. Only
setups using libvirt with raw storage and "use_cow_images = False" were
affected. (CVE-2016-2140)

This issue was discovered by Matthew Booth of Red Hat.

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

Fixes

• BZ - 1313454 - CVE-2016-2140 openstack-nova: Host data leak through resize/migration

CVEs

• CVE-2016-2140

References

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